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1900,-0.283
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1903,-0.37
1904,-0.39
1905,-0.406
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1907,-0.448
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1909,-0.497
1910,-0.504
1911,-0.493
1912,-0.468
1913,-0.438
1914,-0.414
1915,-0.4
1916,-0.395
1917,-0.392
1918,-0.385
1919,-0.373
1920,-0.358
1921,-0.345
1922,-0.333
1923,-0.32
1924,-0.305
1925,-0.288
1926,-0.272
1927,-0.26
1928,-0.25
1929,-0.241
1930,-0.232
1931,-0.224
1932,-0.218
1933,-0.209
1934,-0.192
1935,-0.165
1936,-0.129
1937,-0.09
1938,-0.055
1939,-0.027
1940,-0.011
1941,-0.005
1942,-0.01
1943,-0.026
1944,-0.053
1945,-0.09
1946,-0.132
1947,-0.17
1948,-0.198
1949,-0.209
1950,-0.206
1951,-0.195
1952,-0.185
1953,-0.183
1954,-0.185
1955,-0.185
1956,-0.175
1957,-0.155
1958,-0.131
1959,-0.11
1960,-0.1
1961,-0.1
1962,-0.112
1963,-0.13
1964,-0.148
1965,-0.156
1966,-0.152
1967,-0.138
1968,-0.119
1969,-0.103
1970,-0.092
1971,-0.088
1972,-0.09
1973,-0.095
1974,-0.098
1975,-0.093
1976,-0.076
1977,-0.046
1978,-0.011
1979,0.023
1980,0.049
1981,0.064
1982,0.068
1983,0.066
1984,0.064
1985,0.068
1986,0.082
1987,0.102
1988,0.124
1989,0.14
1990,0.149
1991,0.152
1992,0.156
1993,0.166
1994,0.188
1995,0.219
1996,0.255
1997,0.289
1998,0.317
1999,0.339
2000,0.36
2001,0.381
2002,0.403
2003,0.423
2004,0.437
2005,0.446
2006,0.451
2007,0.455