# year    value 
 1900     0.17 
 1901    -2.06 
 1902     1.17 
 1903    -0.11 
 1904     0.14 
 1905    -1.11 
 1906    -0.21 
 1907    -2.15 
 1908    -0.17 
 1909    -2.27 
 1910     1.32 
 1911    -0.02 
 1912     1.23 
 1913     0.19 
 1914    -0.81 
 1915     0.65 
 1916     2.09 
 1917    -0.91 
 1918    -0.63 
 1919     0.67 
 1920     1.41 
 1921     1.37 
 1922    -1.12 
 1923      0.4 
 1924    -1.68 
 1925     1.33 
 1926     0.74 
 1927        0 
 1928     0.26 
 1929    -4.23 
 1930     0.84 
 1931    -0.24 
 1932    -1.77 
 1933    -0.53 
 1934    -1.43 
 1935     0.33 
 1936     1.39 
 1937     0.99 
 1938    -0.51 
 1939     0.52 
 1940    -2.74 
 1941    -2.08 
 1942    -3.47 
 1943     0.77 
 1944    -0.11 
 1945    -1.12 
 1946     0.07 
 1947    -2.86 
 1948        1 
 1949     0.43 
 1950     0.66 
 1951     0.98 
 1952    -0.32 
 1953    -0.86 
 1954    -1.77 
 1955     1.17 
 1956    -1.67 
 1957     0.62 
 1958     0.71 
 1959     0.67 
 1960     0.73 
 1961      1.1 
 1962     0.06 
 1963    -3.94 
 1964    -1.65 
 1965    -0.83 
 1966     1.16 
 1967      0.1 
 1968    -0.36 
 1969     -1.1 
 1970    -1.12 
 1971    -0.13 
 1972     1.03 
 1973     0.16 
 1974     1.58 
 1975     1.72 
 1976     0.38 
 1977     1.19 
 1978     0.01 
 1979    -0.23 
 1980     0.84 
 1981    -1.42 
 1982    -0.47 
 1983     0.72 
 1984    -0.07 
 1985    -1.92 
 1986    -0.32 
 1987    -1.15 
 1988     1.96 
 1989     1.21 
 1990     2.11 
 1991    -0.63 
 1992     0.05 
 1993     0.33 
 1994     1.76 
 1995     1.82 
 1996    -0.21 
 1997     0.59 
 1998     2.26 
 1999    -0.11 
 2000     0.73 
 2001     2.17 
 2002     0.46 
 2003    -0.37 
 2004     0.57 
 2005    -0.38 
 2006    -0.98 
 2007     3.23 
 2008     1.59 
 2009     0.03 
 2010    -0.16 
 2011     0.04 
 2012     0.03 
 2013     0.17 
 2014     2.69 
 2015     1.46 
 2016     2.76 
 2017     0.32 
 2018     1.01