# year    value 
 1900    32767 
 1901      0.1 
 1902    -0.86 
 1903    -0.94 
 1904    -0.71 
 1905    -0.41 
 1906    -0.62 
 1907    -0.98 
 1908     -1.4 
 1909    -0.85 
 1910    -1.06 
 1911    -1.74 
 1912    -0.54 
 1913    -0.48 
 1914    -1.61 
 1915    -1.07 
 1916     0.31 
 1917    -0.99 
 1918    -1.31 
 1919    -1.31 
 1920    -1.06 
 1921    -1.76 
 1922    -1.14 
 1923     -1.2 
 1924    -1.75 
 1925    -0.48 
 1926    -0.26 
 1927    -0.92 
 1928    -1.38 
 1929    -0.55 
 1930    -1.51 
 1931    -1.22 
 1932    -0.31 
 1933    -0.47 
 1934    -1.62 
 1935    -1.11 
 1936    -0.15 
 1937    -0.88 
 1938    -0.29 
 1939    -0.26 
 1940    -0.72 
 1941    -0.15 
 1942     -0.2 
 1943    -0.28 
 1944     0.73 
 1945     0.63 
 1946     0.23 
 1947    -0.48 
 1948     0.01 
 1949     -0.7 
 1950    -0.61 
 1951     0.43 
 1952    -0.21 
 1953     0.43 
 1954    -0.25 
 1955    -0.42 
 1956    -0.52 
 1957    -0.04 
 1958     0.04 
 1959     0.07 
 1960    -0.15 
 1961     0.12 
 1962     0.45 
 1963    -0.29 
 1964    -0.36 
 1965     0.12 
 1966    -0.05 
 1967    -0.27 
 1968     0.12 
 1969     0.65 
 1970     0.18 
 1971     0.09 
 1972     0.23 
 1973    -0.32 
 1974    -0.32 
 1975    -0.47 
 1976     -0.1 
 1977     0.32 
 1978      0.3 
 1979     0.04 
 1980    -0.06 
 1981     -0.1 
 1982     0.64 
 1983     0.43 
 1984     0.39 
 1985     0.27 
 1986     0.33 
 1987     0.83 
 1988     0.28 
 1989     0.13 
 1990     0.24 
 1991     0.32 
 1992     0.15 
 1993     0.16 
 1994     0.86 
 1995      0.5 
 1996     0.27 
 1997     1.36 
 1998     0.31 
 1999     0.24 
 2000     0.24 
 2001     0.21 
 2002     0.78 
 2003     1.07 
 2004     0.81 
 2005     0.11 
 2006     1.09 
 2007     0.17 
 2008     0.71 
 2009     0.87 
 2010     0.38 
 2011     0.72 
 2012     1.07 
 2013     0.61 
 2014     1.09 
 2015     0.84 
 2016     0.84 
 2017     0.62 
 2018     0.99