# year value 1880 0.39 1881 -1.33 1882 -0.49 1883 -0.25 1884 -0.01 1885 -1.51 1886 -1.16 1887 -0.92 1888 -0.71 1889 -0.09 1890 0.05 1891 -0.01 1892 -1.05 1893 -0.4 1894 -0.52 1895 -0.07 1896 -0.45 1897 -0.41 1898 -0.27 1899 -0.16 1900 -1.23 1901 0.14 1902 -0.47 1903 -0.04 1904 -0.97 1905 -0.61 1906 0.16 1907 -0.65 1908 0.01 1909 -0.22 1910 -0.25 1911 -0.1 1912 -0.87 1913 -0.39 1914 0.04 1915 0.07 1916 -0.11 1917 -0.29 1918 -0.53 1919 -0.36 1920 -0.05 1921 0.24 1922 -0.47 1923 0.41 1924 -0.48 1925 -0.04 1926 0.36 1927 0.68 1928 -0.62 1929 -0.62 1930 0.33 1931 -0.04 1932 -0.28 1933 -0.26 1934 0.2 1935 0.05 1936 0.94 1937 -0.04 1938 0.06 1939 -0.05 1940 0.12 1941 0.46 1942 0.09 1943 -0.13 1944 -0.04 1945 -0.19 1946 -0.16 1947 -0.46 1948 -0.14 1949 -0.54 1950 -0.33 1951 -0.07 1952 0.02 1953 0.43 1954 0.28 1955 -0.45 1956 -0.23 1957 0.39 1958 0.23 1959 -0.06 1960 0.07 1961 -0.13 1962 0.01 1963 -0.5 1964 -0.1 1965 -0.68 1966 0.01 1967 -0.01 1968 -0.07 1969 0.24 1970 -0.34 1971 0.24 1972 -0.17 1973 0.18 1974 0.19 1975 0.22 1976 0.01 1977 0.41 1978 -0.25 1979 -0.2 1980 0.36 1981 0.1 1982 -0.1 1983 0.39 1984 -0.12 1985 -0.39 1986 -0.17 1987 -0.12 1988 0.44 1989 0.62 1990 0.69 1991 1.13 1992 -0.11 1993 0.4 1994 0.76 1995 0.72 1996 0.01 1997 1.31 1998 0.69 1999 0.32 2000 0.14 2001 0.88 2002 1 2003 1.04 2004 0.93 2005 0.95 2006 0.89 2007 1.29 2008 0.52 2009 0.64 2010 1.16 2011 0.94 2012 0.59 2013 1.1 2014 0.9 2015 0.89 2016 1.56 2017 1.07 2018 1.03