| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 97.2862 |
| 2020 | 99.0558 |
| 2019 | - |
| 2018 | 99.0315 |
| 2017 | 97.5959 |
| 2016 | 98.8771 |
| 2015 | 98.7739 |
| 2014 | 98.7934 |
| 2013 | 98.867 |
| 2012 | 98.7905 |
| 2011 | 98.7173 |
| 2010 | 98.6884 |
| 2009 | 98.5942 |
| 2008 | 98.6767 |
| 2007 | - |
| 2006 | 98.5413 |
| 2005 | 98.423 |
| 2004 | 98.5569 |
| 2003 | - |
| 2002 | - |
| 2001 | - |
| 2000 | - |
| 1999 | - |
| 1998 | - |
| 1997 | - |
| 1996 | - |
| 1995 | - |
| 1994 | - |
| 1993 | - |
| 1992 | - |
| 1991 | - |
| 1990 | - |
| 1989 | - |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | 96.4302 |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | 94.4914 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |