| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | -3.69595 |
| 2020 | -2.97951 |
| 2019 | -2.70701 |
| 2018 | -2.8884 |
| 2017 | -2.75568 |
| 2016 | -2.70792 |
| 2015 | -2.89025 |
| 2014 | -2.90608 |
| 2013 | -2.84622 |
| 2012 | -3.39374 |
| 2011 | -3.71555 |
| 2010 | -3.53717 |
| 2009 | -2.89509 |
| 2008 | -5.0161 |
| 2007 | -5.08444 |
| 2006 | -5.69251 |
| 2005 | -5.67444 |
| 2004 | -5.19056 |
| 2003 | -4.556 |
| 2002 | -4.02361 |
| 2001 | -3.56029 |
| 2000 | -3.71744 |
| 1999 | -2.69489 |
| 1998 | -1.79537 |
| 1997 | -1.18881 |
| 1996 | -1.1938 |
| 1995 | -1.17493 |
| 1994 | -1.26916 |
| 1993 | -0.950258 |
| 1992 | -0.532765 |
| 1991 | -0.464638 |
| 1990 | -1.30559 |
| 1989 | -1.53755 |
| 1988 | -2.08905 |
| 1987 | -2.98174 |
| 1986 | -2.87947 |
| 1985 | -2.62776 |
| 1984 | -2.54425 |
| 1983 | -1.42106 |
| 1982 | -0.597346 |
| 1981 | -0.39036 |
| 1980 | -0.456934 |
| 1979 | -0.858095 |
| 1978 | -1.07871 |
| 1977 | -1.10931 |
| 1976 | -0.0870604 |
| 1975 | 0.948185 |
| 1974 | -0.0527425 |
| 1973 | 0.288345 |
| 1972 | -0.263699 |
| 1971 | 0.0533116 |
| 1970 | 0.36793 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |