# year value 1880 -0.99 1881 -0.31 1882 0.16 1883 -0.78 1884 0.83 1885 -0.7 1886 0.36 1887 -0.88 1888 -0.46 1889 0.67 1890 -0.64 1891 -1.17 1892 -0.26 1893 -0.65 1894 -0.67 1895 -0.96 1896 -0.09 1897 -0.22 1898 -0.36 1899 -0.77 1900 0.06 1901 -0.2 1902 -0.4 1903 -0.36 1904 -1.18 1905 -0.62 1906 0.19 1907 -0.64 1908 -0.63 1909 -0.62 1910 -0.47 1911 -0.54 1912 0.24 1913 -0.32 1914 -0.04 1915 0.13 1916 -0.19 1917 -1.09 1918 -1.15 1919 -0.17 1920 -0.06 1921 -0.53 1922 -0.1 1923 -0.08 1924 -0.12 1925 -0.59 1926 0.46 1927 -0.16 1928 -0.13 1929 0.1 1930 -0.3 1931 0.05 1932 0.11 1933 -0.04 1934 -0.47 1935 -0.17 1936 -0.04 1937 -0.09 1938 -0.06 1939 -0.02 1940 -0.11 1941 0.03 1942 0.3 1943 -0.28 1944 -0.05 1945 0.01 1946 -0.2 1947 0.27 1948 -0.19 1949 -0.06 1950 -0.13 1951 -0.44 1952 0.25 1953 -0.11 1954 -0.03 1955 -0.14 1956 -0.38 1957 -0.24 1958 0.3 1959 0.04 1960 -0.02 1961 -0.01 1962 -0.02 1963 -0.18 1964 0.14 1965 -0.23 1966 0 1967 -0.13 1968 -0.12 1969 0.17 1970 0.28 1971 -0.12 1972 -0.2 1973 0.67 1974 -0.35 1975 -0.22 1976 -0.41 1977 0.3 1978 0.26 1979 0.11 1980 0.39 1981 0.21 1982 0.37 1983 0.76 1984 0.21 1985 0.37 1986 0.41 1987 0.45 1988 0.71 1989 0.12 1990 0.3 1991 0.52 1992 0.51 1993 0.18 1994 0.4 1995 0.51 1996 0.42 1997 0.28 1998 1.15 1999 0.5 2000 0.18 2001 0.28 2002 0.39 2003 0.77 2004 0.68 2005 0.9 2006 0.64 2007 0.74 2008 0.41 2009 0.52 2010 0.9 2011 0.43 2012 0.44 2013 0.88 2014 0.59 2015 0.79 2016 1.26 2017 0.89 2018 0.72 2019 1.11