# year value 1880 -0.01 1881 0.6 1882 0.03 1883 0 1884 -0.42 1885 -0.1 1886 -0.4 1887 -0.21 1888 -1.2 1889 0.32 1890 -0.18 1891 -0.18 1892 -0.05 1893 -0.44 1894 -0.45 1895 -0.64 1896 -0.56 1897 -0.56 1898 -0.6 1899 -0.4 1900 -0.51 1901 -0.61 1902 -0.55 1903 -0.36 1904 -0.17 1905 -0.17 1906 -0.63 1907 -0.55 1908 -0.16 1909 -0.42 1910 -0.72 1911 -0.4 1912 -0.59 1913 -0.75 1914 0.03 1915 -0.57 1916 -0.07 1917 -0.76 1918 -0.8 1919 -0.09 1920 -0.53 1921 -0.55 1922 -0.6 1923 -0.66 1924 -0.8 1925 -0.63 1926 -0.58 1927 -0.51 1928 -0.62 1929 -0.48 1930 -0.55 1931 -0.89 1932 -0.03 1933 -0.35 1934 -0.47 1935 0.3 1936 -0.48 1937 -0.52 1938 -0.06 1939 -0.32 1940 -0.39 1941 -0.65 1942 -0.26 1943 -0.07 1944 0.06 1945 0.27 1946 -0.08 1947 0.05 1948 -0.44 1949 -0.13 1950 -0.06 1951 0.05 1952 0.11 1953 0.16 1954 -0.15 1955 -0.29 1956 -0.83 1957 0.23 1958 0.12 1959 -0.64 1960 -0.01 1961 -0.24 1962 0.15 1963 -0.32 1964 -0.28 1965 -0.3 1966 0.38 1967 0.3 1968 0.25 1969 0.11 1970 0.27 1971 -0.28 1972 -0.16 1973 0.04 1974 0.18 1975 0 1976 -0.38 1977 0.29 1978 0.61 1979 0.33 1980 0.32 1981 0.53 1982 0.46 1983 0.43 1984 -0.4 1985 0.15 1986 0.27 1987 0.46 1988 0.08 1989 0.45 1990 0.09 1991 0.62 1992 0.16 1993 0.23 1994 0.31 1995 0.24 1996 0.25 1997 0.63 1998 0.81 1999 0.42 2000 0.17 2001 0.02 2002 0.04 2003 0.54 2004 0.4 2005 0.21 2006 0.11 2007 0.42 2008 0.33 2009 1.04 2010 0.83 2011 0.46 2012 0.6 2013 0.72 2014 0.45 2015 1.2 2016 0.84 2017 0.83 2018 0.84 2019 1.06