# year value 1880 -0.12 1881 -1.1 1882 0.63 1883 -1.29 1884 -0.45 1885 -1.06 1886 -0.89 1887 -0.73 1888 -1.1 1889 -0.49 1890 -0.19 1891 -0.9 1892 0 1893 -1.94 1894 -0.45 1895 -1.08 1896 -0.37 1897 -0.45 1898 -0.18 1899 -0.19 1900 -0.68 1901 0.01 1902 -0.09 1903 -0.09 1904 -0.76 1905 -0.68 1906 -0.06 1907 -0.54 1908 -0.37 1909 -0.55 1910 -0.1 1911 -0.7 1912 -0.21 1913 -0.35 1914 0.61 1915 0.19 1916 0.12 1917 -1.05 1918 -0.9 1919 -0.28 1920 -0.26 1921 0.04 1922 -0.37 1923 -0.05 1924 -0.15 1925 -0.02 1926 0.54 1927 -0.18 1928 -0.09 1929 -0.65 1930 -0.34 1931 -0.13 1932 0.42 1933 -0.3 1934 -0.16 1935 0.26 1936 -0.41 1937 0.43 1938 0.18 1939 0.04 1940 0.09 1941 0.1 1942 -0.09 1943 0.04 1944 0.66 1945 -0.2 1946 -0.14 1947 -0.27 1948 0.18 1949 0.07 1950 -0.38 1951 -0.46 1952 0.36 1953 0.15 1954 -0.19 1955 0.2 1956 -0.48 1957 -0.16 1958 0.47 1959 0.18 1960 0.26 1961 0.36 1962 0.2 1963 0.12 1964 -0.02 1965 -0.24 1966 -0.07 1967 -0.38 1968 -0.09 1969 -0.46 1970 0.25 1971 -0.22 1972 -0.45 1973 0.41 1974 -0.28 1975 0.09 1976 -0.12 1977 -0.1 1978 0.17 1979 -0.1 1980 0.48 1981 0.69 1982 0.29 1983 0.76 1984 0.27 1985 -0.17 1986 0.37 1987 0.4 1988 0.7 1989 0.63 1990 0.56 1991 0.61 1992 0.6 1993 0.65 1994 0.14 1995 1.08 1996 0.42 1997 0.61 1998 1.06 1999 1.12 2000 0.98 2001 0.57 2002 1.26 2003 0.72 2004 1.15 2005 0.85 2006 0.84 2007 1.54 2008 0.72 2009 0.9 2010 0.86 2011 0.63 2012 0.79 2013 0.91 2014 0.88 2015 1.29 2016 2.1 2017 1.54 2018 1.3 2019 1.39