| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | 64.9124 |
| 2021 | 65.0781 |
| 2020 | 65.2653 |
| 2019 | 65.4723 |
| 2018 | 65.6913 |
| 2017 | 65.8778 |
| 2016 | 66.1535 |
| 2015 | 66.3751 |
| 2014 | 66.441 |
| 2013 | 66.572 |
| 2012 | 66.7733 |
| 2011 | 66.986 |
| 2010 | 67.1049 |
| 2009 | 67.1369 |
| 2008 | 67.1934 |
| 2007 | 67.227 |
| 2006 | 67.1584 |
| 2005 | 67.0289 |
| 2004 | 66.8797 |
| 2003 | 66.7297 |
| 2002 | 66.5726 |
| 2001 | 66.4177 |
| 2000 | 66.257 |
| 1999 | 66.0783 |
| 1998 | 65.9489 |
| 1997 | 65.8376 |
| 1996 | 65.7293 |
| 1995 | 65.6539 |
| 1994 | 65.6552 |
| 1993 | 65.7141 |
| 1992 | 65.8111 |
| 1991 | 65.9892 |
| 1990 | 66.1589 |
| 1989 | 66.2822 |
| 1988 | 66.4902 |
| 1987 | 66.6819 |
| 1986 | 66.7058 |
| 1985 | 66.6568 |
| 1984 | 66.6266 |
| 1983 | 66.5669 |
| 1982 | 66.469 |
| 1981 | 66.3912 |
| 1980 | 66.2488 |
| 1979 | 65.9995 |
| 1978 | 65.6727 |
| 1977 | 65.3061 |
| 1976 | 64.9051 |
| 1975 | 64.442 |
| 1974 | 63.9479 |
| 1973 | 63.433 |
| 1972 | 62.8915 |
| 1971 | 62.3715 |
| 1970 | 61.9129 |
| 1969 | 61.4755 |
| 1968 | 61.0055 |
| 1967 | 60.628 |
| 1966 | 60.1675 |
| 1965 | 59.8653 |
| 1964 | 59.9403 |
| 1963 | 59.974 |
| 1962 | 59.8777 |
| 1961 | 59.7776 |
| 1960 | 59.9545 |