# year value 1880 0.62 1881 -1.06 1882 -0.69 1883 2 1884 0.62 1885 -2.15 1886 -1.25 1887 1.65 1888 0.05 1889 -1.05 1890 -1.25 1891 0.02 1892 -1.93 1893 -1.8 1894 -1.67 1895 0.56 1896 0.86 1897 -1.79 1898 -1.58 1899 0.21 1900 0.59 1901 0.39 1902 -1.06 1903 -0.36 1904 -0.07 1905 -0.46 1906 -1.16 1907 -1.24 1908 -0.39 1909 -0.36 1910 -0.01 1911 -1.3 1912 -1.16 1913 1.12 1914 0.7 1915 -0.8 1916 -2.58 1917 -0.81 1918 -0.65 1919 -0.9 1920 -1.36 1921 -2.05 1922 -0.95 1923 -1.36 1924 -1.46 1925 -1 1926 -0.25 1927 -0.6 1928 -1.26 1929 -0.34 1930 -0.26 1931 -0.95 1932 0.33 1933 -0.63 1934 0.14 1935 0.15 1936 -0.32 1937 0.3 1938 -0.6 1939 1.28 1940 0.68 1941 0.63 1942 -1.34 1943 -0.47 1944 0.94 1945 0.55 1946 -0.49 1947 -0.29 1948 -0.14 1949 -0.51 1950 0.2 1951 0.8 1952 -0.71 1953 -0.06 1954 -0.46 1955 -0.81 1956 -0.57 1957 -0.52 1958 0.53 1959 0.16 1960 -0.18 1961 0.37 1962 -0.66 1963 0.6 1964 -0.52 1965 0.68 1966 -0.06 1967 -0.5 1968 0.55 1969 0.24 1970 -0.03 1971 -0.06 1972 0.37 1973 -0.45 1974 -0.17 1975 -0.18 1976 -0.24 1977 0.5 1978 0.18 1979 0.57 1980 0.07 1981 0.13 1982 0.63 1983 -0.21 1984 -0.34 1985 0.22 1986 0.79 1987 0.9 1988 -0.16 1989 0.59 1990 0.25 1991 0.3 1992 0.19 1993 0.18 1994 0.58 1995 0.46 1996 0.19 1997 1.32 1998 0.98 1999 0.04 2000 -0.02 2001 0.68 2002 0.36 2003 0.37 2004 0.47 2005 0.8 2006 1.29 2007 -0.37 2008 0.78 2009 0.63 2010 0.14 2011 0.36 2012 0.47 2013 0.41 2014 0.87 2015 1.65 2016 0.97 2017 1.45 2018 -0.1