# year    value 
 1900 -5.877477 
 1901 -6.16729 
 1902 -6.108182 
 1903 -6.413613 
 1904 -6.448503 
 1905 -6.237905 
 1906 -6.223492 
 1907 -6.167068 
 1908 -6.140203 
 1909 -6.156744 
 1910 -6.159284 
 1911 -6.040186 
 1912 -6.043481 
 1913 -6.201672 
 1914 -6.206712 
 1915 -6.14748 
 1916 -6.000776 
 1917 -5.993123 
 1918 -6.02004 
 1919 -6.117024 
 1920 -5.954394 
 1921 -6.048781 
 1922 -6.075208 
 1923 -5.94014 
 1924 -5.982948 
 1925 -6.003369 
 1926 -5.987361 
 1927 -5.960962 
 1928 -5.975551 
 1929 -6.014532 
 1930 -6.053204 
 1931 -5.974196 
 1932 -6.06041 
 1933 -6.04471 
 1934 -5.960006 
 1935 -5.989496 
 1936 -5.899941 
 1937 -5.939646 
 1938 -5.900427 
 1939 -5.991695 
 1940 -5.991543 
 1941 -6.029428 
 1942 -5.954434 
 1943 -5.890385 
 1944 -5.91187 
 1945 -5.819237 
 1946 -5.955235 
 1947 -5.887494 
 1948 -5.884003 
 1949 -5.916559 
 1950 -5.873494 
 1951 -5.900095 
 1952 -5.957495 
 1953 -5.831005 
 1954 -5.85479 
 1955 -5.910745 
 1956 -5.940024 
 1957 -5.89129 
 1958 -5.900167 
 1959 -5.924164 
 1960 -5.914673 
 1961 -5.915549 
 1962 -5.958164 
 1963 -5.923182 
 1964 -6.127351 
 1965 -6.146348 
 1966 -6.087255 
 1967 -6.070221 
 1968 -6.015418 
 1969 -6.162717 
 1970 -6.085117 
 1971 -5.925572 
 1972 -5.818048 
 1973 -5.930016 
 1974 -5.821686 
 1975 -5.953526 
 1976 -5.831619 
 1977 -5.896955 
 1978 -5.847507 
 1979 -5.851814 
 1980 -5.721459 
 1981 -5.682655 
 1982 -5.69097 
 1983 -6.095275 
 1984 -5.879434 
 1985 -5.812465 
 1986 -5.787316 
 1987 -5.762856 
 1988 -5.588102 
 1989 -5.665294 
 1990 -5.587896 
 1991 -5.468865 
 1992 -6.011611 
 1993 -5.853506 
 1994 -5.783041 
 1995 -5.574867 
 1996 -5.514882 
 1997 -5.51765 
 1998 -5.475712 
 1999 -5.393945 
 2000 -5.308004 
 2001 -5.325912 
 2002 -5.249813 
 2003 -5.218349 
 2004 -5.328127 
 2005 -5.268612