# year value 1880 -1.2 1881 -1.46 1882 -1.1 1883 -0.91 1884 -0.91 1885 -0.22 1886 -0.93 1887 -0.13 1888 0.14 1889 -0.56 1890 -0.21 1891 -0.31 1892 -0.12 1893 -0.29 1894 0.03 1895 -0.07 1896 -0.7 1897 -0.16 1898 -0.14 1899 0.62 1900 -0.02 1901 0.17 1902 -0.2 1903 -0.47 1904 0.2 1905 -0.13 1906 -0.39 1907 -0.2 1908 -0.47 1909 -0.01 1910 -0.21 1911 -0.09 1912 -1.67 1913 -0.02 1914 -0.13 1915 -0.37 1916 -0.38 1917 0.24 1918 0.02 1919 -0.35 1920 -0.56 1921 0.03 1922 -0.27 1923 -0.02 1924 0.07 1925 0.4 1926 0.26 1927 0.7 1928 0.01 1929 0.1 1930 0.06 1931 0.18 1932 0.67 1933 0.41 1934 0.07 1935 -0.17 1936 0.26 1937 0.29 1938 0.33 1939 0.24 1940 0.05 1941 0 1942 0.43 1943 0.42 1944 -0.04 1945 0.64 1946 0.09 1947 0.27 1948 -0.04 1949 0.3 1950 -0.52 1951 0.31 1952 -0.43 1953 0.18 1954 0.35 1955 0.1 1956 -0.36 1957 -0.04 1958 0.22 1959 -0.15 1960 -0.02 1961 -0.26 1962 -0.07 1963 0.65 1964 -0.23 1965 -0.05 1966 0.03 1967 -0.17 1968 -0.19 1969 -0.2 1970 -0.36 1971 0.23 1972 -0.58 1973 0.15 1974 -0.22 1975 0.2 1976 -0.48 1977 0.46 1978 0.18 1979 0.25 1980 0.57 1981 -0.35 1982 -0.07 1983 0.81 1984 -0.31 1985 -0.51 1986 -0.16 1987 0.07 1988 0.9 1989 0.47 1990 1.19 1991 0.5 1992 -0.15 1993 -0.22 1994 0.65 1995 0.93 1996 -0.16 1997 0.56 1998 1 1999 1 2000 -0.26 2001 1.28 2002 0.59 2003 0.67 2004 0.93 2005 1.11 2006 1 2007 1.03 2008 1.08 2009 0.51 2010 1.2 2011 0.78 2012 0.97 2013 1.14 2014 1.17 2015 1.09 2016 0.68 2017 1.05 2018 0.99