# year value 1880 0.27 1881 -1.53 1882 0.61 1883 -2.46 1884 -1.42 1885 -2.32 1886 0.06 1887 -1.69 1888 -1.65 1889 0 1890 -0.67 1891 0.29 1892 -0.19 1893 -1.47 1894 -1.31 1895 -1.22 1896 0.65 1897 0.21 1898 -0.22 1899 -2.16 1900 0.56 1901 0.48 1902 0.35 1903 -1.34 1904 -0.3 1905 -0.87 1906 0.35 1907 0.75 1908 1.11 1909 0.16 1910 -2.32 1911 0.14 1912 -1.1 1913 -1.52 1914 0.3 1915 -1.07 1916 -0.81 1917 -2.28 1918 -0.59 1919 -0.19 1920 -0.35 1921 1.21 1922 -1.15 1923 0 1924 0.19 1925 -0.56 1926 1.39 1927 0.52 1928 -0.44 1929 -2.4 1930 0.03 1931 1.39 1932 -0.45 1933 -1.81 1934 2.44 1935 1.03 1936 -1.82 1937 -2.48 1938 0.81 1939 -0.13 1940 0.86 1941 1.51 1942 0.23 1943 0.59 1944 0.36 1945 0.57 1946 -0.09 1947 0.53 1948 -0.46 1949 -3.13 1950 -0.87 1951 0.52 1952 -0.56 1953 1.66 1954 1.63 1955 -0.61 1956 -0.52 1957 0.21 1958 1.8 1959 0.23 1960 -0.38 1961 0.85 1962 -0.95 1963 0.33 1964 -0.54 1965 -0.16 1966 -0.82 1967 0.68 1968 -0.08 1969 -1.09 1970 0.95 1971 -0.09 1972 -0.63 1973 -1.03 1974 0.13 1975 -0.21 1976 1.41 1977 0.05 1978 -0.65 1979 -3.32 1980 1.06 1981 2.42 1982 -0.48 1983 1.6 1984 -0.71 1985 -1.41 1986 0.99 1987 1.43 1988 -0.03 1989 -0.71 1990 0.65 1991 0.08 1992 2.28 1993 -1.35 1994 0.21 1995 2.03 1996 0.91 1997 0.26 1998 1.7 1999 1.91 2000 2.55 2001 -0.46 2002 1.27 2003 1.64 2004 0.65 2005 1.76 2006 1.89 2007 0.29 2008 -0.2 2009 0.54 2010 -0.7 2011 -0.02 2012 1.66 2013 0.45 2014 -0.06 2015 2.28 2016 2.22 2017 0.94 2018 0.99 2019 -0.01