# year    value 
 1900    32767 
 1901    -1.06 
 1902    -0.25 
 1903    -0.62 
 1904    -1.75 
 1905    -1.84 
 1906    -1.04 
 1907    -1.05 
 1908    -0.92 
 1909    -1.56 
 1910    -1.96 
 1911    -1.66 
 1912    -0.84 
 1913    -0.64 
 1914     -0.9 
 1915    -1.17 
 1916    -1.05 
 1917    -1.35 
 1918    -1.53 
 1919    -0.88 
 1920    -0.67 
 1921    -1.63 
 1922    -1.23 
 1923    -1.22 
 1924    -1.46 
 1925    -0.37 
 1926    -0.31 
 1927     -0.4 
 1928    -1.76 
 1929    -0.93 
 1930    -0.01 
 1931    -0.55 
 1932     0.04 
 1933    -0.85 
 1934    -0.79 
 1935    -0.35 
 1936    -0.17 
 1937     0.03 
 1938    -0.42 
 1939        0 
 1940    -0.89 
 1941        0 
 1942     0.41 
 1943     0.11 
 1944    -0.36 
 1945     0.23 
 1946     -0.3 
 1947     0.02 
 1948    -0.04 
 1949    -0.07 
 1950    -0.46 
 1951    -0.68 
 1952     0.26 
 1953     0.13 
 1954     0.08 
 1955     0.18 
 1956     -0.6 
 1957    -0.14 
 1958     0.45 
 1959    -0.11 
 1960     0.07 
 1961     0.34 
 1962    -0.06 
 1963    -0.11 
 1964     0.18 
 1965    -0.06 
 1966    -0.15 
 1967    -0.16 
 1968     0.01 
 1969     0.31 
 1970     0.25 
 1971    -0.57 
 1972     0.19 
 1973     0.62 
 1974    -0.78 
 1975    -0.31 
 1976    -0.26 
 1977      0.4 
 1978    -0.09 
 1979     0.02 
 1980     0.34 
 1981     0.08 
 1982     0.16 
 1983      1.3 
 1984     0.24 
 1985     -0.2 
 1986     0.21 
 1987     0.84 
 1988     0.43 
 1989     0.51 
 1990     0.34 
 1991     0.08 
 1992     0.43 
 1993     0.28 
 1994     0.11 
 1995     0.76 
 1996     0.17 
 1997     0.07 
 1998     1.43 
 1999     0.35 
 2000     0.02 
 2001     0.59 
 2002     0.49 
 2003     0.76 
 2004     0.54 
 2005     0.83 
 2006     0.66 
 2007     0.77 
 2008     0.29 
 2009      0.5 
 2010        1 
 2011     0.28 
 2012     0.74 
 2013     0.77 
 2014     0.87 
 2015     0.68 
 2016     1.44 
 2017     1.48 
 2018     0.66