# year value 1880 -0.98 1881 -0.33 1882 0.16 1883 -0.78 1884 0.83 1885 -0.7 1886 0.36 1887 -0.88 1888 -0.46 1889 0.68 1890 -0.61 1891 -1.18 1892 -0.28 1893 -0.65 1894 -0.63 1895 -0.89 1896 -0.08 1897 -0.23 1898 -0.35 1899 -0.73 1900 0.06 1901 -0.21 1902 -0.36 1903 -0.33 1904 -1.17 1905 -0.67 1906 0.11 1907 -0.63 1908 -0.6 1909 -0.63 1910 -0.49 1911 -0.57 1912 0.2 1913 -0.33 1914 -0.07 1915 0.09 1916 -0.23 1917 -1.05 1918 -1.12 1919 -0.16 1920 -0.03 1921 -0.52 1922 -0.13 1923 -0.11 1924 -0.13 1925 -0.52 1926 0.45 1927 -0.13 1928 -0.12 1929 0.08 1930 -0.26 1931 0.06 1932 0.1 1933 -0.09 1934 -0.48 1935 -0.19 1936 -0.06 1937 -0.09 1938 -0.09 1939 -0.04 1940 -0.14 1941 0.06 1942 0.33 1943 -0.27 1944 -0.07 1945 0.02 1946 -0.15 1947 0.27 1948 -0.17 1949 -0.05 1950 -0.14 1951 -0.43 1952 0.25 1953 -0.09 1954 -0.02 1955 -0.13 1956 -0.39 1957 -0.24 1958 0.32 1959 0.05 1960 -0.02 1961 0.02 1962 -0.03 1963 -0.17 1964 0.15 1965 -0.23 1966 0.01 1967 -0.12 1968 -0.12 1969 0.18 1970 0.27 1971 -0.14 1972 -0.2 1973 0.66 1974 -0.36 1975 -0.22 1976 -0.4 1977 0.31 1978 0.25 1979 0.08 1980 0.37 1981 0.21 1982 0.35 1983 0.78 1984 0.21 1985 0.33 1986 0.38 1987 0.47 1988 0.71 1989 0.13 1990 0.28 1991 0.49 1992 0.51 1993 0.18 1994 0.38 1995 0.53 1996 0.39 1997 0.26 1998 1.18 1999 0.48 2000 0.18 2001 0.29 2002 0.38 2003 0.77 2004 0.66 2005 0.89 2006 0.64 2007 0.74 2008 0.38 2009 0.5 2010 0.92 2011 0.42 2012 0.45 2013 0.86 2014 0.6 2015 0.78 2016 1.28 2017 0.93 2018 0.7 2019 1.1