| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 84.8551 |
| 2020 | 87.5677 |
| 2019 | 87.8887 |
| 2018 | 88.2992 |
| 2017 | 88.1674 |
| 2016 | 88.8351 |
| 2015 | 88.8894 |
| 2014 | 88.6269 |
| 2013 | 88.7264 |
| 2012 | - |
| 2011 | - |
| 2010 | - |
| 2009 | - |
| 2008 | - |
| 2007 | - |
| 2006 | - |
| 2005 | 80.6348 |
| 2004 | - |
| 2003 | - |
| 2002 | - |
| 2001 | - |
| 2000 | - |
| 1999 | 71.1524 |
| 1998 | 70.5077 |
| 1997 | - |
| 1996 | 78.8334 |
| 1995 | 79.4405 |
| 1994 | 78.3683 |
| 1993 | 77.5162 |
| 1992 | 75.4626 |
| 1991 | 70.9646 |
| 1990 | 69.6768 |
| 1989 | 67.6751 |
| 1988 | 66.2651 |
| 1987 | 63.9273 |
| 1986 | 61.3857 |
| 1985 | 60.1063 |
| 1984 | 59.8563 |
| 1983 | 58.8377 |
| 1982 | 58.3784 |
| 1981 | 56.9812 |
| 1980 | 54.6654 |
| 1979 | 53.7413 |
| 1978 | 54.5648 |
| 1977 | 53.9238 |
| 1976 | 55.7511 |
| 1975 | 52.3714 |
| 1974 | 48.7368 |
| 1973 | 49.8313 |
| 1972 | 50.6804 |
| 1971 | 49.9503 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |