# year    value 
 1900    32767 
 1901     0.48 
 1902    -0.93 
 1903    -0.53 
 1904     0.34 
 1905     0.17 
 1906    -1.29 
 1907    -1.43 
 1908     -0.2 
 1909     -0.7 
 1910     0.13 
 1911    -1.07 
 1912    -0.93 
 1913     0.96 
 1914     1.27 
 1915    -0.94 
 1916    -2.63 
 1917    -1.11 
 1918     -0.5 
 1919    -0.74 
 1920    -1.66 
 1921    -2.46 
 1922    -1.42 
 1923    -1.37 
 1924    -1.68 
 1925    -0.54 
 1926    -0.03 
 1927    -0.94 
 1928    -1.49 
 1929    -0.71 
 1930     0.02 
 1931       -1 
 1932     0.43 
 1933    -0.68 
 1934     0.27 
 1935     -0.1 
 1936    -0.45 
 1937     0.12 
 1938    -0.73 
 1939     0.98 
 1940     0.72 
 1941     0.21 
 1942    -1.33 
 1943    -0.44 
 1944     1.31 
 1945     1.09 
 1946    -0.19 
 1947    -0.28 
 1948    -0.05 
 1949    -0.51 
 1950     0.05 
 1951     0.99 
 1952    -0.45 
 1953     0.23 
 1954    -0.43 
 1955    -0.78 
 1956    -0.53 
 1957    -0.14 
 1958     0.35 
 1959     0.16 
 1960     0.15 
 1961     0.12 
 1962    -0.52 
 1963     0.55 
 1964    -0.65 
 1965     0.95 
 1966    -0.14 
 1967    -0.69 
 1968     0.29 
 1969     0.41 
 1970    -0.15 
 1971    -0.26 
 1972     0.56 
 1973    -0.25 
 1974    -0.32 
 1975    -0.28 
 1976    -0.17 
 1977     0.22 
 1978     0.03 
 1979     0.48 
 1980     0.32 
 1981     0.14 
 1982     0.63 
 1983     0.55 
 1984    -0.12 
 1985     0.22 
 1986     0.45 
 1987     0.98 
 1988    -0.26 
 1989     0.22 
 1990     0.11 
 1991     0.33 
 1992      0.2 
 1993     0.38 
 1994     0.49 
 1995     0.29 
 1996    -0.19 
 1997     1.74 
 1998     0.98 
 1999    -0.04 
 2000     0.05 
 2001     0.35 
 2002     0.25 
 2003     0.47 
 2004      0.1 
 2005     0.57 
 2006     1.11 
 2007     -0.6 
 2008     0.56 
 2009     0.57 
 2010     0.15 
 2011     0.43 
 2012     0.66 
 2013     0.26 
 2014     0.85 
 2015     1.58 
 2016     0.96 
 2017     1.05 
 2018    -0.09