# year    value 
 1901  -3.2727 
 1902 1.413983 
 1903 0.3315721 
 1904 0.572269 
 1905 -0.5241725 
 1906 0.2112814 
 1907 -1.586046 
 1908 0.4039021 
 1909 -1.702082 
 1910 1.814418 
 1911 0.5996526 
 1912 2.114268 
 1913 0.6859397 
 1914 -0.3176725 
 1915 1.153468 
 1916 2.709908 
 1917 -0.4161482 
 1918 -0.1255882 
 1919 1.325689 
 1920 2.209791 
 1921 1.902277 
 1922 -0.4103521 
 1923 1.100161 
 1924 -0.901498 
 1925 1.928381 
 1926 1.255944 
 1927 0.5209485 
 1928 0.9645303 
 1929 -2.874215 
 1930 1.568869 
 1931 0.3223968 
 1932 -1.005153 
 1933 0.05418277 
 1934 -0.9261973 
 1935 1.111339 
 1936 1.747097 
 1937 1.340029 
 1938 0.05552538 
 1939 1.048236 
 1940 -2.385372 
 1941 -1.699829 
 1942 -2.778592 
 1943 1.247917 
 1944 0.7203896 
 1945 -0.7361646 
 1946 0.8499739 
 1947 -2.369606 
 1948 1.579499 
 1949 1.091714 
 1950 1.356091 
 1951 1.498045 
 1952 0.1542228 
 1953 -0.306981 
 1954 -1.019562 
 1955 1.680852 
 1956 -0.4719974 
 1957 1.245322 
 1958 1.314225 
 1959 1.256127 
 1960 1.306796 
 1961 1.756201 
 1962 0.7415747 
 1963 -3.40502 
 1964 -1.13153 
 1965 -0.2049761 
 1966 1.794469 
 1967 0.785808 
 1968 0.2244267 
 1969 -0.4794336 
 1970 -0.481271 
 1971 0.3351384 
 1972 1.731604 
 1973 0.6681502 
 1974 2.281484 
 1975 2.495218 
 1976 1.044656 
 1977   1.7308 
 1978 0.6129999 
 1979 0.4580655 
 1980 1.566907 
 1981 -0.7295517 
 1982 0.1789156 
 1983 1.383051 
 1984 0.5597265 
 1985 -1.255932 
 1986 0.2115055 
 1987 -0.4701939 
 1988 2.555826 
 1989 2.015698 
 1990 2.829073 
 1991 -0.1027934 
 1992 0.851203 
 1993 1.229647 
 1994 2.350042 
 1995  2.47576 
 1996 0.3664802 
 1997 1.328648 
 1998 3.004085 
 1999 0.6028635 
 2000 1.351739 
 2001 2.717877 
 2002 1.276922 
 2003 0.3187403 
 2004 1.234824 
 2005 0.2639147 
 2006 -0.4590771 
 2007 3.982614 
 2008 2.434726 
 2009 0.600338 
 2010 0.3165013 
 2011 0.682646 
 2012 0.667326 
 2013 0.703312 
 2014 3.445596 
 2015 2.158513 
 2016 3.433594 
 2017  1.30786 
 2018  1.59113