年份 | 美国 |
---|---|
2023 | - |
2022 | - |
2021 | 75.3835 |
2020 | 77.1137 |
2019 | 79.9772 |
2018 | 79.9317 |
2017 | 79.7792 |
2016 | 79.8487 |
2015 | 80.2513 |
2014 | 80.5504 |
2013 | 80.6649 |
2012 | 80.7255 |
2011 | 80.711 |
2010 | 80.7062 |
2009 | 80.2902 |
2008 | 79.9626 |
2007 | 79.7527 |
2006 | 79.4065 |
2005 | 79.1109 |
2004 | 79.2138 |
2003 | 78.6746 |
2002 | 78.5378 |
2001 | 78.5079 |
2000 | 78.3778 |
1999 | 78.1321 |
1998 | 77.8888 |
1997 | 77.3617 |
1996 | 76.2946 |
1995 | 75.3462 |
1994 | 74.9842 |
1993 | 74.7314 |
1992 | 74.8833 |
1991 | 74.4141 |
1990 | 74.107 |
1989 | 73.6323 |
1988 | 73.2577 |
1987 | 73.1794 |
1986 | 72.91 |
1985 | 72.7065 |
1984 | 72.6751 |
1983 | 72.4409 |
1982 | 72.0303 |
1981 | 71.224 |
1980 | 70.5195 |
1979 | 70.3453 |
1978 | 69.565 |
1977 | 69.1128 |
1976 | 68.4409 |
1975 | 67.7371 |
1974 | 66.7411 |
1973 | 65.5773 |
1972 | 65.0307 |
1971 | 65.0228 |
1970 | 64.2318 |
1969 | 63.8413 |
1968 | 63.3322 |
1967 | 64.072 |
1966 | 63.6328 |
1965 | 63.8742 |
1964 | 63.9001 |
1963 | 63.7341 |
1962 | 64.2507 |
1961 | 64.6059 |
1960 | 63.7633 |