# year value 1880 0.28 1881 -2.71 1882 -0.7 1883 0.22 1884 -1.16 1885 -1.15 1886 -0.72 1887 0.08 1888 -2.82 1889 -0.11 1890 -0.25 1891 0.02 1892 -1.46 1893 0.01 1894 -0.2 1895 -1.23 1896 -2.26 1897 -1.07 1898 -0.19 1899 -1.36 1900 -0.35 1901 -0.23 1902 -2.06 1903 -0.43 1904 0.15 1905 0.83 1906 0.92 1907 -0.02 1908 -0.99 1909 -0.82 1910 -0.74 1911 -0.9 1912 1.03 1913 0.04 1914 -0.79 1915 1.46 1916 -0.87 1917 0.27 1918 -1.03 1919 -0.53 1920 -0.36 1921 0.22 1922 -0.9 1923 -0.58 1924 0.04 1925 0.05 1926 2.25 1927 -1.19 1928 -0.81 1929 -0.54 1930 0.02 1931 -0.76 1932 0.72 1933 -0.31 1934 0.02 1935 -0.4 1936 0.08 1937 -0.12 1938 1.15 1939 0.88 1940 1.93 1941 0.4 1942 -0.66 1943 2.27 1944 0.55 1945 0.55 1946 -0.76 1947 0.91 1948 0.97 1949 0.77 1950 -0.51 1951 -0.54 1952 -0.16 1953 1.17 1954 0.44 1955 -1.08 1956 -0.79 1957 0.14 1958 -0.36 1959 -0.2 1960 0.33 1961 -0.92 1962 0.9 1963 -0.49 1964 -1.78 1965 0.85 1966 -0.99 1967 1.04 1968 1.45 1969 -0.17 1970 0.5 1971 -0.56 1972 -0.66 1973 0.14 1974 0.14 1975 0.92 1976 -0.22 1977 0.07 1978 0.82 1979 -0.07 1980 0.25 1981 2.12 1982 -0.17 1983 0.59 1984 1.25 1985 -0.79 1986 -0.3 1987 -0.33 1988 1.35 1989 1 1990 3.57 1991 1.32 1992 0.56 1993 1.62 1994 0.66 1995 1.24 1996 1.45 1997 1.76 1998 0.74 1999 0.05 2000 1.81 2001 1.13 2002 1.74 2003 1.68 2004 1.34 2005 2.6 2006 0.09 2007 1.74 2008 1.92 2009 1.41 2010 2.05 2011 2.61 2012 1.33 2013 1.22 2014 2.52 2015 2.48 2016 3.73 2017 2.88 2018 2.15 2019 4.05