年份 | 美国 |
---|---|
2023 | - |
2022 | - |
2021 | - |
2020 | 49.7664 |
2019 | - |
2018 | 46.4446 |
2017 | - |
2016 | 44.622 |
2015 | 43.4329 |
2014 | 42.8737 |
2013 | 42.1647 |
2012 | 41.1223 |
2011 | 40.5313 |
2010 | 39.8992 |
2009 | 39.153 |
2008 | 38.4407 |
2007 | - |
2006 | 37.6 |
2005 | 36.005 |
2004 | 37.207 |
2003 | - |
2002 | - |
2001 | - |
2000 | - |
1999 | - |
1998 | - |
1997 | - |
1996 | - |
1995 | - |
1994 | 44.5495 |
1993 | - |
1992 | - |
1991 | - |
1990 | - |
1989 | - |
1988 | - |
1987 | - |
1986 | - |
1985 | - |
1984 | - |
1983 | - |
1982 | - |
1981 | 27.9943 |
1980 | 28.1006 |
1979 | 26.9 |
1978 | - |
1977 | - |
1976 | - |
1975 | 22.2 |
1974 | - |
1973 | - |
1972 | - |
1971 | - |
1970 | 18.6633 |
1969 | - |
1968 | - |
1967 | - |
1966 | - |
1965 | - |
1964 | - |
1963 | - |
1962 | - |
1961 | - |
1960 | - |