Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1851 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1852 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1853 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1854 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1855 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1856 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1857 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1858 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1859 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1860 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1861 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1862 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1863 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1864 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1865 "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" "NA" 1866 -0.62 -0.12 -0.62 -0.65 0.04 -0.82 -0.34 0.36 -0.18 0.07 1.10 -0.16 1867 0.09 -0.01 -0.09 0.83 0.50 -0.48 0.44 0.34 0.12 -0.56 -0.65 -0.89 1868 -0.16 -0.34 -1.56 0.30 -1.34 -2.20 -0.40 -1.41 -1.23 -1.24 -1.49 0.52 1869 -1.90 -0.26 -0.59 2.12 1.40 1.53 1.42 0.94 0.12 0.85 0.56 0.42 1870 1.06 0.18 -0.75 0.47 -0.11 -1.10 0.17 0.98 0.00 -0.58 -0.86 -1.29 1871 -1.13 -0.13 -2.00 -0.46 -0.47 0.24 0.31 0.38 0.58 -0.14 -0.02 0.97 1872 2.69 1.12 1.69 -0.54 1.35 2.45 2.30 0.99 3.14 1.90 3.09 2.80 1873 2.47 1.12 1.63 2.29 1.19 -3.09 -1.14 -0.59 -2.13 -1.78 -0.36 1.33 1874 0.90 -0.28 -0.52 0.98 1.29 -1.92 -0.14 0.75 2.03 2.19 0.53 1.28 1875 0.65 -0.11 -1.00 1.40 0.75 2.57 -0.49 -0.21 0.83 0.93 -1.54 -0.54 1876 1.16 0.98 -0.10 0.94 0.75 1.98 -0.51 1.08 0.98 -1.00 -0.46 -0.45 1877 -0.88 -1.44 -1.07 -3.87 -1.71 -4.34 -0.96 -1.06 -1.71 -1.70 -1.31 -1.52 1878 -0.98 -2.22 -1.86 -1.07 0.10 -0.59 1.60 1.12 1.70 0.94 1.39 1.89 1879 1.28 1.33 1.30 1.59 0.10 1.85 2.19 2.20 1.80 1.53 0.76 -0.71 1880 1.14 0.70 1.43 0.79 1.22 0.97 0.21 1.26 0.73 0.56 0.74 -0.33 1881 -0.84 -0.67 0.02 0.43 -0.56 -0.78 -0.51 -1.39 -1.35 -2.60 0.49 0.70 1882 -0.76 -0.26 0.41 -0.06 0.35 -1.75 -2.13 -2.74 -1.44 -0.09 0.21 1.04 1883 0.48 -0.95 -2.94 1.63 1.47 0.26 -1.01 0.06 -0.81 0.36 0.19 -1.77 1884 -1.40 -0.61 0.88 -1.60 0.18 0.98 -0.28 -0.63 -0.70 0.38 -0.26 -1.50 1885 -1.78 0.04 0.39 0.16 0.01 -1.91 -0.45 -1.13 -0.43 -1.92 -1.55 0.47 1886 -0.22 0.00 0.15 0.49 0.54 0.43 0.74 1.33 1.28 1.30 0.88 1.51 1887 1.20 0.95 0.95 1.00 -0.58 0.46 0.53 0.33 0.45 0.51 -0.63 0.45 1888 -0.32 -0.33 -1.47 -2.80 -1.12 -2.16 -1.64 -1.09 -0.94 -1.61 -1.37 -0.40 1889 -2.84 -0.21 -3.20 0.07 -0.19 2.49 0.18 0.05 1.05 0.29 1.92 2.35 1890 2.16 1.03 1.43 0.75 0.35 0.45 -0.23 -0.42 0.88 0.17 0.16 -0.04 1891 1.56 -0.49 -1.22 0.70 0.28 -0.28 -0.58 -1.20 -1.08 0.05 -0.49 -0.62 1892 0.20 -1.13 1.09 0.96 1.37 2.25 0.78 0.48 0.01 0.85 -0.88 0.30 1893 0.91 0.65 0.32 1.44 1.76 2.15 1.88 0.60 1.21 0.63 0.83 -0.50 1894 2.15 0.97 0.82 1.10 -0.86 -0.01 0.47 -1.40 -0.24 0.31 -0.89 0.07 1895 0.54 0.62 -0.26 1.34 0.65 -1.26 -0.75 -1.02 -0.52 -0.82 -0.47 -1.00 1896 0.07 0.37 -0.84 -1.19 -3.23 -2.99 -1.39 -2.55 -1.88 -2.01 -1.26 -1.69 1897 -1.42 -0.86 -2.01 -2.00 -1.59 -0.16 -0.19 -0.11 0.00 0.10 -0.96 1.04 1898 0.65 0.47 2.02 1.34 -0.11 -0.51 0.65 0.72 0.88 0.34 0.02 0.42 1899 1.31 0.87 1.38 0.49 -0.76 -1.43 -0.53 -1.18 -0.19 0.74 1.66 -0.44 1900 -0.89 -0.73 -2.95 -2.10 -0.76 3.10 1.02 0.75 -1.61 -2.13 -0.75 -0.73 1901 -0.09 0.21 0.88 0.64 0.08 2.30 1.51 0.80 -1.58 -2.69 -0.95 -0.32 1902 1.68 -0.28 1.10 1.15 1.41 0.24 0.21 -1.09 -1.76 -0.77 -0.26 -0.45 1903 -1.10 -1.11 1.80 2.18 0.92 -0.22 0.60 -0.15 0.81 0.30 -0.05 1.66 1904 1.39 1.53 0.89 3.64 1.00 -1.01 -0.87 -0.11 -0.01 -0.11 -1.81 0.18 1905 -1.08 -1.84 -3.51 -3.05 -1.68 -2.29 -2.11 -0.96 -0.70 -0.83 -1.81 -1.57 1906 -0.43 -0.88 -0.56 -0.84 -1.03 -0.71 0.68 1.43 1.75 0.81 1.95 0.30 1907 0.56 -0.23 -0.32 -0.84 -0.57 0.45 -0.03 -1.05 -0.07 -0.43 -0.58 0.65 1908 -0.99 0.84 -0.41 1.02 0.18 -0.63 1.43 0.20 1.67 0.72 0.09 -0.71 1909 -0.30 -0.40 -0.15 -1.78 0.07 2.63 1.08 0.89 0.06 0.20 0.74 0.41 1910 0.60 1.42 1.25 0.39 0.09 2.49 2.07 0.89 1.46 1.04 1.74 1.66 1911 0.30 0.01 0.22 0.05 -0.74 -1.55 -1.26 -1.41 -0.88 -1.30 -0.81 -0.27 1912 -1.11 -1.83 -1.14 -2.27 -1.12 -0.99 -0.05 -0.94 -0.40 -0.97 0.12 -1.01 1913 -0.41 -0.63 0.01 -0.79 -0.56 -0.60 -0.12 -0.92 -0.95 -1.02 -1.25 -0.89 1914 -0.74 0.18 0.88 -2.27 -1.21 -2.64 -0.97 -1.84 -1.47 -0.73 -0.47 0.17 1915 -2.71 -0.59 -2.49 -1.49 1.22 2.68 2.53 1.30 1.34 0.95 -1.74 0.99 1916 0.56 -0.52 -0.83 0.01 0.43 0.75 2.57 1.51 0.42 0.36 0.77 1.62 1917 0.46 0.98 1.86 2.58 2.40 2.39 2.83 3.48 2.84 1.51 1.93 2.40 1918 1.46 1.58 -0.39 2.07 1.09 -0.78 -1.38 -0.64 -0.85 -0.62 0.02 -1.00 1919 -1.62 -1.19 -1.57 -0.37 -0.96 -1.46 -0.87 -0.90 -0.59 -1.25 -1.23 -1.12 1920 0.18 -0.29 -0.63 -0.10 -0.40 0.40 0.92 0.44 0.47 -0.69 -0.19 0.99 1921 1.09 0.58 1.07 -1.28 -0.01 4.07 0.29 -0.88 0.46 0.97 0.76 0.81 1922 0.78 0.77 0.48 -0.69 -0.76 0.45 0.23 -0.28 0.46 0.55 0.76 1.21 1923 0.56 0.34 0.84 0.81 -0.01 -0.17 -1.11 -2.14 -1.46 -0.72 -1.41 0.13 1924 -0.68 0.01 0.11 -1.95 1.19 0.84 0.78 0.88 0.74 0.63 1.02 0.48 1925 0.54 1.22 1.52 1.48 -0.30 -0.82 -1.31 -1.24 -0.66 -1.50 -0.97 -0.89 1926 -0.62 -1.56 -1.65 -0.75 -0.28 -1.05 -0.09 -0.92 0.12 0.24 0.07 0.59 1927 0.51 0.01 1.84 0.75 0.62 0.91 0.17 -0.75 -0.07 -0.55 -0.91 0.75 1928 -1.22 0.95 1.38 1.44 -0.09 -1.15 -0.02 0.80 0.74 0.77 0.21 1.20 1929 1.74 1.69 0.41 0.58 -1.20 0.06 0.21 -0.17 -0.07 0.80 0.95 0.53 1930 1.31 0.68 0.04 -0.33 0.47 -0.84 -0.40 -0.39 -0.72 0.46 0.30 -0.27 1931 0.63 -1.61 0.44 1.10 1.66 2.23 0.98 -0.50 0.35 -1.00 -0.37 0.81 1932 0.21 -0.36 -0.72 -2.76 0.09 -0.26 -1.52 -0.90 -0.86 -0.69 -0.61 0.25 1933 -1.22 0.34 -0.35 0.47 0.74 -0.68 0.38 -0.23 0.17 0.17 0.53 0.81 1934 0.62 -0.06 -0.12 0.64 -0.76 1.12 0.30 -2.44 -0.64 0.38 1.21 -0.38 1935 0.64 -0.56 1.21 0.37 -0.46 -0.42 -0.02 0.00 0.59 0.60 0.30 -0.56 1936 -0.30 -0.04 0.05 2.81 0.27 -0.37 0.43 -1.00 0.23 -0.11 -1.55 -0.04 1937 0.95 -0.59 0.55 0.18 0.19 0.22 -0.53 0.20 0.04 -0.39 -0.46 0.64 1938 0.75 0.21 -0.55 0.39 1.18 2.01 1.87 1.24 0.69 1.37 -0.07 1.42 1939 1.74 0.66 1.14 1.13 -0.10 -0.37 0.84 -0.11 -0.95 -1.71 -0.96 -1.07 1940 -0.06 -0.56 -1.34 -0.94 -1.39 -2.49 -1.50 -2.11 -1.95 -1.80 -0.77 -3.38 1941 -1.13 -1.60 -1.33 -1.19 -0.75 -1.89 -2.00 -2.20 -0.83 -2.29 -1.09 -1.07 1942 -1.51 -0.51 -0.80 -0.52 0.25 0.80 -0.08 0.30 0.82 0.70 -0.64 1.42 1943 0.88 0.91 0.29 1.59 0.25 -1.13 0.30 0.69 0.53 0.79 0.22 -1.06 1944 -0.95 0.30 0.46 -0.54 0.02 -0.61 -0.85 0.13 0.22 -1.03 -0.84 0.36 1945 0.43 0.53 1.33 -0.73 0.02 0.80 0.39 1.06 0.80 0.21 -0.45 0.63 1946 -0.32 0.29 -0.38 -1.03 -1.19 -1.32 -0.99 -0.64 -1.58 -1.38 -0.25 -0.71 1947 -0.63 -0.56 1.13 -0.56 -1.24 0.16 0.98 0.66 1.10 -0.35 0.75 0.47 1948 -0.43 -0.41 -0.60 0.26 0.35 -0.76 0.09 -0.55 -0.76 0.54 0.19 -0.72 1949 -0.86 0.05 0.49 0.28 -0.68 -1.60 -0.15 -0.64 0.17 0.38 -0.77 0.77 1950 0.54 1.58 1.79 1.67 0.55 3.06 2.14 1.14 0.63 1.68 0.89 2.46 1951 1.32 0.47 -0.71 -1.03 -1.29 -0.52 -1.33 -0.75 -1.17 -1.44 -0.98 -0.90 1952 -0.92 -0.83 -0.02 -0.73 0.67 0.78 0.51 -0.38 -0.24 0.12 -0.22 -1.40 1953 0.12 -0.72 -0.79 -0.18 -2.72 -0.47 -0.06 -1.89 -1.35 -0.18 -0.36 -0.61 1954 0.57 -0.52 -0.31 0.41 0.15 -0.49 0.36 0.90 0.17 0.09 0.16 1.31 1955 -0.68 1.30 0.13 -0.81 0.88 1.63 1.80 1.38 1.40 1.51 1.38 0.91 1956 1.16 1.10 0.89 1.06 1.44 1.26 1.19 1.05 0.06 1.92 0.11 0.99 1957 0.43 -0.36 -0.37 0.05 -1.18 -0.37 0.18 -1.08 -1.01 -0.09 -1.23 -0.44 1958 -1.89 -0.78 -0.32 0.03 -1.39 -0.27 0.23 0.72 -0.34 -0.56 -0.61 -0.84 1959 -0.94 -1.50 0.77 0.35 0.14 -0.96 -0.47 -0.68 -0.01 0.34 0.90 0.81 1960 -0.05 -0.25 0.47 0.79 0.30 -0.47 0.50 0.53 0.65 -0.20 0.60 0.63 1961 -0.43 0.58 -2.47 1.15 0.18 -0.53 0.18 -0.16 0.11 -0.73 0.68 1.31 1962 1.72 -0.41 -0.32 0.30 1.10 0.37 -0.04 0.26 0.53 0.95 0.27 -0.10 1963 0.80 0.26 0.66 0.51 0.14 -1.30 -0.13 -0.43 -0.60 -1.46 -0.93 -1.35 1964 -0.53 -0.13 0.71 1.78 -0.02 0.72 0.62 1.32 1.29 1.26 -0.06 -0.49 1965 -0.52 0.01 0.24 -1.34 -0.03 -1.63 -2.32 -1.37 -1.41 -1.22 -1.86 0.02 1966 -1.36 -0.54 -1.75 -0.90 -0.71 0.14 -0.15 0.19 -0.24 -0.33 -0.20 -0.61 1967 1.52 1.20 0.65 -0.12 -0.41 0.67 0.18 0.44 0.44 -0.17 -0.57 -0.78 1968 0.47 0.77 -0.56 -0.31 1.21 1.27 0.77 -0.20 -0.36 -0.35 -0.44 0.13 1969 -1.36 -0.85 -0.03 -0.90 -0.78 -0.24 -0.73 -0.71 -1.10 -1.35 -0.18 0.24 1970 -1.26 -1.22 0.06 -0.56 0.04 1.02 -0.52 0.31 1.18 0.74 1.85 1.83 1971 0.23 1.44 1.98 2.58 0.88 0.21 0.17 1.42 1.51 1.75 0.55 0.15 1972 0.33 0.67 0.13 -0.46 -1.52 -1.68 -1.84 -1.12 -1.48 -1.13 -0.38 -1.47 1973 -0.43 -1.47 -0.06 -0.37 0.25 1.22 0.63 1.18 1.27 0.85 2.85 1.76 1974 2.16 1.49 2.10 1.27 1.24 0.14 1.23 0.56 1.16 0.72 -0.42 -0.14 1975 -0.62 0.46 1.14 1.48 0.51 1.69 2.13 2.03 2.15 1.67 1.25 2.05 1976 1.19 1.18 1.33 0.24 0.50 -0.16 -1.24 -1.46 -1.29 0.13 0.76 -0.48 1977 -0.39 0.65 -1.20 -1.17 -1.18 -2.33 -1.45 -1.42 -0.95 -1.39 -1.56 -1.23 1978 -0.48 -2.63 -0.82 -0.88 1.50 0.40 0.53 0.12 0.06 -0.76 -0.28 -0.21 1979 -0.45 0.61 -0.49 -0.65 0.46 0.58 -0.76 -0.69 0.11 -0.37 -0.61 -0.90 1980 0.28 -0.02 -1.06 -1.60 -0.35 -0.68 -0.14 -0.06 -0.54 -0.34 -0.47 -0.21 1981 0.27 -0.47 -2.01 -0.60 0.82 1.28 0.87 0.40 0.52 -0.71 0.07 0.41 1982 0.87 -0.03 0.05 -0.46 -0.74 -2.49 -1.89 -2.66 -2.12 -2.20 -3.25 -2.48 1983 -3.36 -3.46 -3.25 -1.41 0.79 -0.58 -0.70 -0.37 0.91 0.34 -0.12 -0.17 1984 -0.03 0.43 -0.85 0.39 -0.03 -1.22 0.12 0.10 0.17 -0.61 0.12 -0.24 1985 -0.55 0.79 0.20 1.42 -0.15 -1.39 -0.20 0.66 0.00 -0.76 -0.35 0.12 1986 0.82 -1.28 -0.09 0.11 -0.63 1.01 0.24 -0.85 -0.53 0.54 -1.57 -1.64 1987 -0.75 -1.41 -2.03 -2.69 -2.12 -2.69 -1.82 -1.67 -1.13 -0.69 -0.07 -0.66 1988 -0.31 -0.65 0.13 -0.03 1.09 -0.20 1.17 1.36 1.92 1.35 1.92 1.09 1989 1.31 0.80 0.59 2.18 1.45 0.81 0.95 -0.82 0.52 0.61 -0.38 -0.62 1990 -0.21 -1.79 -1.09 -0.01 1.41 -0.07 0.57 -0.71 -0.78 -0.17 -0.68 -0.38 1991 0.45 -0.06 -1.35 -1.55 -1.74 -0.79 -0.07 -1.07 -1.64 -1.55 -0.77 -2.02 1992 -2.85 -1.05 -2.85 -2.06 0.06 -1.82 -0.63 -0.01 0.06 -2.03 -0.84 -0.71 1993 -0.93 -0.96 -1.13 -2.29 -0.59 -2.18 -1.06 -1.73 -0.78 -1.57 -0.13 0.07 1994 -0.25 -0.06 -1.35 -2.63 -1.26 -1.46 -1.70 -2.03 -1.70 -1.58 -0.81 -1.41 1995 -0.51 -0.35 0.24 -1.72 -0.91 -0.31 0.44 -0.11 0.28 -0.34 -0.02 -0.72 1996 0.82 -0.02 0.53 0.91 0.46 1.60 0.70 0.33 0.66 0.26 -0.21 0.71 1997 0.29 1.21 -1.09 -1.55 -2.41 -3.02 -0.91 -2.31 -1.55 -1.69 -1.31 -1.12 1998 -2.53 -1.97 -3.31 -2.80 0.17 1.05 1.49 0.83 1.04 1.01 1.01 1.32 1999 1.58 0.58 0.78 2.10 0.44 0.00 0.52 -0.03 -0.07 0.95 1.22 1.37 2000 0.47 1.24 0.88 1.76 0.42 -0.87 -0.34 0.48 0.97 0.87 2.02 0.77 2001 0.78 1.00 0.46 -0.18 -0.84 -0.19 -0.27 -1.01 0.11 -0.38 0.64 -1.06 2002 0.20 0.64 -0.81 -0.48 -1.54 -1.02 -0.70 -1.62 -0.66 -0.79 -0.60 -1.30 2003 -0.30 -0.90 -0.91 -0.48 -0.85 -1.75 0.26 -0.35 -0.18 -0.26 -0.32 0.92 2004 -1.31 0.77 -0.11 -1.91 1.22 -1.91 -0.72 -0.90 -0.31 -0.42 -1.05 -0.94 2005 0.20 -2.99 -0.26 -1.22 -1.46 0.11 0.06 -0.97 0.34 1.12 -0.42 0.01 2006 1.29 -0.26 1.93 1.17 -0.96 -0.98 -0.90 -1.75 -0.60 -1.52 0.05 "NA" 2007 -0.83 -0.38 -0.30 -0.35 -0.30 0.14 -0.44 0.01 0.12 0.44 0.82 1.49 2008 +1.54 +2.05 +1.04 0.56 +0.16 +0.34 +0.20 +0.64 1.26 1.52 1.64 1.43 2009 0.85 1.37 -0.21 1.06 -0.86 -0.45 0.18 -0.59 0.35 -1.66 -0.67 -0.95 2010 -1.13 -1.59 -1.40 1.628 0.932 0.000 1.902 1.771 2.398 1.756 1.399 2.861