# year value 1880 1.05 1881 -2.72 1882 1.7 1883 -2.66 1884 -1.96 1885 -3.41 1886 -0.46 1887 -2.72 1888 -2.04 1889 0.56 1890 -0.04 1891 0.75 1892 0.46 1893 -1.64 1894 -1.29 1895 -1.3 1896 0.94 1897 0.35 1898 0.43 1899 -2.45 1900 0.38 1901 0.49 1902 0.16 1903 -1.23 1904 -0.52 1905 -1.62 1906 0.76 1907 0.4 1908 1.46 1909 0.29 1910 -2.09 1911 0.16 1912 -1.45 1913 -1.1 1914 0.57 1915 -0.94 1916 -0.82 1917 -2.02 1918 -1.62 1919 0.4 1920 -0.41 1921 1.74 1922 -0.76 1923 0.21 1924 0.52 1925 -0.53 1926 1.67 1927 0.63 1928 -0.27 1929 -2.14 1930 0.03 1931 2.54 1932 0.73 1933 -0.75 1934 2.16 1935 1.22 1936 -2.61 1937 -1.99 1938 0.67 1939 0.28 1940 0.41 1941 1.54 1942 0.91 1943 0.48 1944 1.09 1945 0.64 1946 0.19 1947 0.49 1948 -0.5 1949 -2.37 1950 -0.85 1951 0.21 1952 0.12 1953 1.78 1954 1.86 1955 0.19 1956 -0.82 1957 0.49 1958 1.8 1959 -0.48 1960 0.07 1961 0.88 1962 -0.85 1963 -0.02 1964 -0.07 1965 -0.63 1966 -0.84 1967 0.52 1968 0.02 1969 -1.24 1970 0.55 1971 -0.26 1972 -0.64 1973 -0.55 1974 0.24 1975 0.19 1976 1.82 1977 -0.04 1978 -1.99 1979 -3.58 1980 0.97 1981 2.35 1982 -0.91 1983 1.95 1984 -0.59 1985 -1.07 1986 0.92 1987 2.24 1988 0.12 1989 -0.09 1990 0.88 1991 0.48 1992 3.1 1993 -1.08 1994 -0.2 1995 2.03 1996 0.52 1997 -0.01 1998 2.28 1999 2.24 2000 2.96 2001 -0.72 2002 2.1 2003 1.35 2004 0.94 2005 1.98 2006 2.43 2007 0.5 2008 0.03 2009 0.46 2010 -1.01 2011 -0.28 2012 2.23 2013 1.06 2014 -0.61 2015 1.72 2016 2.85 2017 1.54 2018 0.45 2019 0.04