| | 1949 | | | 1950 | | 1951 | | 1952 | | | 1953 | | 1954 | | 1955 | | 1956 | | 1957 | | | 1958 | | 1959 | | 1960 | | 1961 | | 1962 | | | 1963 | | 1964 | | 1965 | | | 1966 | | 1967 | | 1968 | | 1969 | | 1970 | | | 1971 | | 1972 | | 1973 | | 1974 | | 1975 | | | 1976 | | 1977 | | 1978 | | 1979 | | 1980 | | | 1981 | | 1982 | | 1983 | | 1984 | | 1985 | | | 1986 | | 1987 | | 1988 | | 1989 | | 1990 | | | 1991 | | 1992 | | 1993 | | 1994 | | 1995 | | | 1996 | | 1997 | | 1998 | | 1999 | | 2000 | | | 2001 | | 2002 | | 2003 | | 2004 | | 2005 | | | 2006 | | 2007 | | 2008 | | |
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| | | | | | 53.1 | 1.4 | | | 0.004 | | | | | | | 55.4 | 1.6 | | 15 | 0.005 | | 56.5 | 2.0 | | 34 | 0.01 | | 60.8 | 2.5 | | 51 | 0.01 | | | | | | | 59.7 | 2.4 | | 40 | 0.03 | | 59.0 | 2.4 | | 30 | 0.08 | | 58.2 | 2.4 | | 45 | 0.10 | | 57.3 | 3.6 | | 111 | 0.21 | | 53.3 | 3.9 | 2.2 | 316 | 0.20 | | | | | | | 49.3 | 9.5 | | 1406 | 0.34 | | 44.6 | 13.7 | | 2473 | 0.66 | | 43.5 | 14.9 | 10.0 | 2813 | 0.97 | | 43.7 | 10.1 | | 1839 | 0.86 | | 44.5 | 10.8 | 14.8 | 4191 | 1.3 | | | | | | | 44.7 | 16.1 | | 10732 | 1.5 | | 44.7 | 20.7 | | 10418 | 1.7 | | 44.7 | 24.5 | 24.1 | 16627 | 2.5 | | | | | | | 44.5 | 25.2 | 27.9 | 19350 | 3.2 | | 44.4 | 24.7 | 30.6 | 18906 | 3.1 | | 44.4 | 25.6 | 33.2 | 23073 | 3.1 | | 44.4 | 26.2 | 38.0 | 19811 | 3.8 | | 44.1 | 27.8 | 42.4 | 19836 | 4.8 | | | | | | | 44.0 | 28.3 | 53.9 | 24817 | 4.8 | | 44.0 | 27.6 | 66.5 | 31746 | 6.2 | | 43.9 | 28.9 | 83.4 | 30460 | 7.5 | | 43.7 | 30.8 | 101.7 | 36798 | 8.1 | | 43.6 | 32.5 | 124.4 | 49476 | 11.2 | | | | | | | 43.4 | 33.1 | 143.7 | 51264 | 11.4 | | 43.2 | 33.7 | 166.1 | 51447 | 10.2 | | 42.9 | 34.2 | 189.4 | 58802 | 11.6 | | 42.7 | 34.1 | 212.2 | 63124 | 11.3 | | 42.6 | 34.0 | 234.6 | 76753 | 12.3 | | | | | | | 42.5 | 34.1 | 244.8 | 91844 | 11.2 | | 42.4 | 33.9 | 242.2 | 96961 | 12.0 | | 42.3 | 34.3 | 261.8 | 104608 | 12.0 | | 42.2 | 34.3 | 290.8 | 119289 | 10.7 | | 42.1 | 33.8 | 320.4 | 126830 | 8.2 | | | | | | | 41.9 | 33.8 | 345.5 | 180640 | 9.1 | | 41.8 | 33.8 | 388.4 | 159450 | 10.0 | | 41.6 | 33.8 | 399.7 | 163986 | 10.6 | | 41.4 | 33.8 | 423.9 | 128414 | 11.8 | | 41.3 | 33.5 | 416.2 | 122711 | 14.4 | | | | | | | 41.1 | 32.9 | 384.8 | 111347 | 14.4 | | 40.9 | 33.1 | 399.8 | 143963 | 14.4 | | 40.6 | 31.5 | 450.5 | 169911 | 14.9 | | 40.2 | 32.3 | 459.2 | 172042 | 19.8 | | 39.4 | 29.2 | 468.1 | 201731 | 18.8 | | | | | | | 34.4 | 30.2 | 468.4 | 275871 | 18.9 | | 34.2 | 32.3 | 433.2 | 301655 | 19.7 | | 34.1 | 32.4 | 415.5 | 290859 | 19.3 | | 33.8 | 32.2 | 410.4 | 330069 | 19.0 | | 32.9 | 32.3 | 399.2 | 572257 | 17.9 | | | | | | | 29.2 | 32.3 | 394.9 | 619806 | 15.7 | | 27.5 | 22.0 | 381.8 | 414248 | 14.9 | | 26.0 | 17.9 | 366.9 | 427266 | 14.3 | | 23.6 | 18.7 | 340.3 | 383954 | 14.5 | | 23.3 | 18.1 | 337.7 | 421680 | 14.8 | | | | | | | 23.3 | 18.2 | 325.5 | 416459 | 14.8 | | 23.2 | 17.4 | 300.5 | 411238 | 14.0 | | 23.2 | 17.2 | 267.0 | 427377 | 13.6 | | | | | | | | | | | |