# year value 1880 0.44 1881 -0.14 1882 -0.72 1883 -0.25 1884 -0.35 1885 -0.68 1886 -0.92 1887 0.01 1888 0.39 1889 0.75 1890 0.03 1891 -1.04 1892 0.68 1893 -0.42 1894 -0.15 1895 0.69 1896 0.25 1897 -0.88 1898 0.01 1899 0.63 1900 0.04 1901 0.14 1902 -0.1 1903 -1.27 1904 -0.6 1905 -2.06 1906 -0.39 1907 -1.26 1908 -0.19 1909 0.07 1910 -0.51 1911 -0.56 1912 -0.37 1913 -1.08 1914 -0.18 1915 0.67 1916 0.21 1917 -0.26 1918 -0.36 1919 0.45 1920 -0.94 1921 0.11 1922 0.24 1923 0 1924 -0.27 1925 -0.2 1926 -0.55 1927 -0.81 1928 0.28 1929 0.84 1930 -0.2 1931 -0.16 1932 0.25 1933 -0.48 1934 -0.81 1935 0 1936 -0.76 1937 -0.38 1938 0.9 1939 -0.53 1940 -0.21 1941 1.03 1942 0.75 1943 -0.11 1944 0.29 1945 0.17 1946 0.67 1947 0.88 1948 0.17 1949 0.02 1950 -0.05 1951 -0.74 1952 0.16 1953 0.37 1954 -0.3 1955 -0.44 1956 0.26 1957 -0.72 1958 0.55 1959 -0.05 1960 -0.44 1961 0.17 1962 -0.15 1963 0.23 1964 0.36 1965 -0.23 1966 0.15 1967 -0.25 1968 -0.22 1969 0.56 1970 -0.49 1971 0.23 1972 0.12 1973 0.51 1974 0.32 1975 -0.14 1976 -0.6 1977 0.25 1978 0.35 1979 -0.16 1980 0.2 1981 0.71 1982 -0.01 1983 -0.4 1984 0.3 1985 0.07 1986 -0.24 1987 0.18 1988 -0.05 1989 -0.02 1990 -0.11 1991 -0.05 1992 -0.04 1993 -0.11 1994 0.41 1995 0.33 1996 -0.19 1997 0.97 1998 0.84 1999 0.83 2000 1.15 2001 1.27 2002 1.03 2003 0.27 2004 1.52 2005 0.85 2006 0.84 2007 1.35 2008 1.58 2009 1.19 2010 0.85 2011 0.5 2012 0.99 2013 1.4 2014 1.04 2015 1.24 2016 1.54 2017 1.14 2018 1.98 2019 1.36