# year value 1880 -0.85 1881 -0.14 1882 -0.36 1883 -0.77 1884 -0.62 1885 -1.11 1886 -0.44 1887 -1.08 1888 -0.79 1889 0.4 1890 -0.9 1891 -1.09 1892 -0.84 1893 -0.93 1894 -1.13 1895 -0.56 1896 -0.64 1897 -0.41 1898 -1.08 1899 -1 1900 -0.5 1901 -0.58 1902 -0.23 1903 -0.46 1904 -1.04 1905 -0.45 1906 0.05 1907 -0.74 1908 -0.71 1909 -0.72 1910 -0.51 1911 -0.64 1912 -0.09 1913 -0.78 1914 0.13 1915 0.14 1916 -0.22 1917 -1.19 1918 -0.95 1919 0.19 1920 -0.46 1921 -0.36 1922 -0.28 1923 -0.14 1924 -0.46 1925 -0.34 1926 -0.08 1927 -0.44 1928 -0.07 1929 -0.72 1930 -0.37 1931 -0.1 1932 -0.15 1933 0.03 1934 -0.25 1935 -0.45 1936 -0.15 1937 -0.34 1938 0.18 1939 -0.2 1940 -0.21 1941 0.23 1942 0.26 1943 -0.19 1944 -0.41 1945 -0.08 1946 -0.19 1947 -0.1 1948 -0.22 1949 -0.27 1950 -0.15 1951 -0.21 1952 0.12 1953 0.08 1954 -0.08 1955 -0.35 1956 -0.38 1957 0.01 1958 0.47 1959 0.16 1960 -0.38 1961 0.2 1962 -0.19 1963 -0.12 1964 0.06 1965 -0.26 1966 -0.02 1967 0 1968 -0.43 1969 0.35 1970 0.2 1971 -0.27 1972 -0.07 1973 0.6 1974 -0.26 1975 -0.03 1976 -0.3 1977 0.11 1978 0.19 1979 0.15 1980 0.57 1981 0.33 1982 0.14 1983 0.74 1984 0.23 1985 0.35 1986 0.56 1987 0.62 1988 0.67 1989 0.24 1990 0.62 1991 0.53 1992 0.77 1993 0.52 1994 0.38 1995 0.42 1996 0.42 1997 0.19 1998 1.14 1999 0.45 2000 0.2 2001 0.44 2002 0.94 2003 0.7 2004 0.53 2005 0.99 2006 0.39 2007 0.73 2008 0.19 2009 0.68 2010 1.04 2011 0.34 2012 0.46 2013 0.74 2014 0.75 2015 0.85 2016 1.28 2017 0.98 2018 0.95 2019 1.19