| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 44.3634 |
| 2020 | 44.3634 |
| 2019 | 44.3634 |
| 2018 | 44.3634 |
| 2017 | 44.3634 |
| 2016 | 44.3037 |
| 2015 | 44.244 |
| 2014 | 44.1844 |
| 2013 | 44.1247 |
| 2012 | 44.065 |
| 2011 | 44.2788 |
| 2010 | 44.4925 |
| 2009 | 44.7063 |
| 2008 | 44.92 |
| 2007 | 45.0623 |
| 2006 | 45.0668 |
| 2005 | 45.0713 |
| 2004 | 45.0758 |
| 2003 | 45.0803 |
| 2002 | 45.0849 |
| 2001 | 45.2901 |
| 2000 | 45.2306 |
| 1999 | 45.1893 |
| 1998 | 45.2658 |
| 1997 | 45.2983 |
| 1996 | 45.4534 |
| 1995 | 45.8719 |
| 1994 | 45.9811 |
| 1993 | 46.1786 |
| 1992 | 46.4495 |
| 1991 | 46.6153 |
| 1990 | 46.6153 |
| 1989 | 46.6153 |
| 1988 | 46.6153 |
| 1987 | 46.6153 |
| 1986 | 47.1013 |
| 1985 | 47.1013 |
| 1984 | 47.1013 |
| 1983 | 47.1013 |
| 1982 | 47.1013 |
| 1981 | 46.748 |
| 1980 | 46.748 |
| 1979 | 46.748 |
| 1978 | 46.748 |
| 1977 | 46.9847 |
| 1976 | 46.9658 |
| 1975 | 46.9658 |
| 1974 | 46.9658 |
| 1973 | 47.0796 |
| 1972 | 47.1997 |
| 1971 | 47.3089 |
| 1970 | 47.429 |
| 1969 | 47.5433 |
| 1968 | 47.5813 |
| 1967 | 47.528 |
| 1966 | 47.5545 |
| 1965 | 47.5898 |
| 1964 | 47.9325 |
| 1963 | 48.1979 |
| 1962 | 48.4761 |
| 1961 | 48.8602 |
| 1960 | - |