# year value 1880 -0.62 1881 0.2 1882 32767 1883 32767 1884 32767 1885 32767 1886 32767 1887 32767 1888 32767 1889 0.23 1890 -1.74 1891 -1.31 1892 -0.55 1893 -1.07 1894 -0.24 1895 -0.14 1896 -0.14 1897 -0.28 1898 -0.28 1899 -0.32 1900 0.32 1901 -0.48 1902 0.24 1903 -0.56 1904 -0.78 1905 -0.67 1906 0.38 1907 -0.99 1908 -0.63 1909 -0.78 1910 -0.97 1911 -0.81 1912 -0.1 1913 -0.26 1914 -0.38 1915 -0.03 1916 -0.34 1917 -0.91 1918 -0.79 1919 0.2 1920 0.09 1921 -0.38 1922 -0.85 1923 -0.42 1924 -0.27 1925 0.1 1926 0.18 1927 -0.39 1928 -0.02 1929 -0.47 1930 -0.1 1931 -0.31 1932 -0.14 1933 -0.37 1934 -0.13 1935 -0.34 1936 -0.07 1937 -0.38 1938 -0.35 1939 -0.25 1940 0.03 1941 0.38 1942 -0.09 1943 -0.33 1944 -0.19 1945 0.28 1946 0.09 1947 -0.04 1948 -0.09 1949 0.04 1950 -0.07 1951 -0.16 1952 0.26 1953 0.15 1954 -0.14 1955 -0.39 1956 -0.47 1957 0.01 1958 0.28 1959 0.13 1960 -0.27 1961 0.32 1962 -0.15 1963 -0.02 1964 -0.04 1965 -0.16 1966 0.01 1967 0.31 1968 -0.64 1969 0.62 1970 0.24 1971 -0.26 1972 0.03 1973 0.44 1974 -0.25 1975 -0.03 1976 -0.33 1977 0.2 1978 -0.08 1979 -0.03 1980 0.53 1981 0.19 1982 0.13 1983 1.27 1984 0.07 1985 0.25 1986 0.37 1987 0.85 1988 0.46 1989 0.02 1990 0.38 1991 0.49 1992 1.13 1993 0.63 1994 0.5 1995 0.48 1996 0.25 1997 0.42 1998 1.13 1999 0.17 2000 0.2 2001 0.52 2002 0.97 2003 0.62 2004 0.35 2005 0.66 2006 0.43 2007 0.43 2008 0.04 2009 0.71 2010 1.04 2011 0.47 2012 0.76 2013 0.48 2014 0.59 2015 1.28 2016 1.08 2017 0.92 2018 0.82 2019 1.09