# year value 1900 0.36 1901 -0.02 1902 -0.07 1903 -0.6 1904 -0.63 1905 -0.52 1906 0.36 1907 -0.32 1908 -0.03 1909 -0.39 1910 -0.46 1911 -0.57 1912 -0.08 1913 0.08 1914 0.38 1915 0.01 1916 0.05 1917 -0.43 1918 0.17 1919 0.21 1920 -0.04 1921 0.02 1922 -0.39 1923 -0.03 1924 -0.95 1925 -0.54 1926 0.18 1927 -0.29 1928 -0.73 1929 0 1930 -0.14 1931 -0.32 1932 0.21 1933 -0.37 1934 -0.06 1935 -0.51 1936 -0.33 1937 -0.33 1938 -0.49 1939 0.4 1940 -0.5 1941 -0.49 1942 0.02 1943 0.36 1944 0.03 1945 -0.01 1946 -0.21 1947 -0.14 1948 -0.29 1949 -0.38 1950 -0.22 1951 -0.14 1952 -0.05 1953 -0.2 1954 -0.22 1955 0.25 1956 -0.45 1957 -0.25 1958 -0.2 1959 -0.22 1960 0.19 1961 0.14 1962 0.06 1963 0.16 1964 -0.31 1965 -0.2 1966 -0.34 1967 -0.43 1968 0.31 1969 -0.14 1970 0.21 1971 -0.26 1972 -0.2 1973 0.36 1974 0.09 1975 0.03 1976 -0.03 1977 0.04 1978 0.36 1979 0.65 1980 0.4 1981 0.67 1982 0.46 1983 0.5 1984 0.31 1985 0.21 1986 0.15 1987 0.15 1988 0.21 1989 0.74 1990 0.57 1991 0.46 1992 -0.17 1993 0.18 1994 0.02 1995 0.58 1996 0.17 1997 0.45 1998 0.28 1999 0.83 2000 0.43 2001 0.87 2002 -0.04 2003 0.54 2004 0.48 2005 0.54 2006 0.53 2007 0.62 2008 0.76 2009 0.87 2010 0.66 2011 0.76 2012 0.78 2013 0.92 2014 0.91 2015 0.74 2016 1.15 2017 1.01 2018 1.43