# year value 1880 -0.06 1881 -0.35 1882 0.07 1883 -0.09 1884 -1.01 1885 -0.65 1886 -0.66 1887 -0.59 1888 -0.66 1889 -0.17 1890 0.17 1891 -0.33 1892 0.07 1893 -0.74 1894 -0.17 1895 -0.38 1896 -0.23 1897 0.2 1898 -0.2 1899 -0.31 1900 0.19 1901 0.05 1902 -0.08 1903 -0.11 1904 -0.5 1905 -0.8 1906 -0.15 1907 -0.01 1908 -0.26 1909 -0.1 1910 -0.4 1911 -0.38 1912 -0.08 1913 -0.29 1914 -0.17 1915 0.15 1916 -0.1 1917 -0.46 1918 -0.8 1919 0.28 1920 -0.36 1921 -0.2 1922 0.14 1923 -0.17 1924 0.1 1925 -0.51 1926 0.08 1927 0.1 1928 0.37 1929 -0.06 1930 -0.35 1931 0.22 1932 0.12 1933 0.07 1934 -0.36 1935 -0.11 1936 0.01 1937 0.21 1938 0.16 1939 0.02 1940 -0.04 1941 0.51 1942 0.25 1943 -0.19 1944 -0.03 1945 -0.24 1946 0.02 1947 0.13 1948 0.07 1949 -0.19 1950 -0.11 1951 -0.3 1952 0.06 1953 0.21 1954 0.06 1955 -0.07 1956 -0.21 1957 -0.39 1958 0.24 1959 0.15 1960 0.18 1961 -0.01 1962 -0.28 1963 0.11 1964 -0.03 1965 -0.13 1966 0.23 1967 -0.2 1968 -0.46 1969 0.4 1970 0.36 1971 -0.16 1972 -0.22 1973 0.38 1974 -0.43 1975 -0.25 1976 -0.39 1977 0.07 1978 0.22 1979 0.57 1980 0.26 1981 -0.1 1982 0.19 1983 -0.18 1984 -0.16 1985 0.19 1986 0.07 1987 0.29 1988 0.65 1989 -0.27 1990 0.33 1991 0.63 1992 -0.2 1993 0.18 1994 0.37 1995 0.16 1996 0.61 1997 0.37 1998 1.02 1999 0.78 2000 0.32 2001 0.44 2002 0.84 2003 0.88 2004 0.7 2005 0.76 2006 0.99 2007 0.66 2008 0.37 2009 0.99 2010 1.4 2011 0.65 2012 0.46 2013 1.05 2014 0.65 2015 0.72 2016 1.13 2017 1.24 2018 1 2019 1.01