# year value 1880 0.12 1881 -0.28 1882 -0.18 1883 -0.39 1884 -1.07 1885 -0.34 1886 -0.18 1887 -0.3 1888 -0.43 1889 0.04 1890 -0.36 1891 0.03 1892 -0.26 1893 -0.41 1894 -0.29 1895 -0.49 1896 -0.4 1897 0.06 1898 0.11 1899 0.27 1900 0.01 1901 -0.06 1902 -0.65 1903 -0.15 1904 -0.56 1905 0.21 1906 0.21 1907 0.22 1908 -0.15 1909 0.45 1910 0.05 1911 0.18 1912 -0.54 1913 -0.21 1914 -0.15 1915 0.52 1916 -0.25 1917 0 1918 -0.1 1919 -0.18 1920 -0.03 1921 0.1 1922 0.03 1923 -0.45 1924 0.14 1925 -0.09 1926 0.28 1927 0.1 1928 -0.12 1929 -0.23 1930 0.09 1931 0.33 1932 -0.12 1933 0.1 1934 0.05 1935 0.16 1936 0.03 1937 0.19 1938 0.05 1939 0.1 1940 0.33 1941 0.2 1942 0.45 1943 0.01 1944 0.07 1945 0.39 1946 0.47 1947 0.08 1948 -0.28 1949 0.12 1950 0 1951 0.39 1952 0.11 1953 0.05 1954 -0.02 1955 -0.07 1956 -0.37 1957 -0.05 1958 0.05 1959 -0.02 1960 0.25 1961 -0.01 1962 0.05 1963 0.24 1964 -0.06 1965 0.07 1966 -0.03 1967 -0.39 1968 0.1 1969 0.12 1970 -0.17 1971 -0.4 1972 0.26 1973 0.07 1974 -0.01 1975 -0.08 1976 -0.29 1977 0.16 1978 -0.06 1979 -0.08 1980 0.25 1981 0.24 1982 0.19 1983 0.48 1984 -0.08 1985 0.19 1986 -0.12 1987 0.58 1988 0.19 1989 0.38 1990 0.51 1991 0.07 1992 -0.07 1993 0.23 1994 0.35 1995 0.63 1996 0.58 1997 0.48 1998 1.1 1999 0.63 2000 0.34 2001 0.75 2002 0.59 2003 0.84 2004 0.41 2005 0.88 2006 0.95 2007 0.52 2008 0.6 2009 0.98 2010 0.7 2011 0.79 2012 0.82 2013 0.59 2014 0.95 2015 1.37 2016 1.31 2017 1.26 2018 0.72