| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 14.1341 |
| 2020 | -8.95777 |
| 2019 | 1.14472 |
| 2018 | 4.20508 |
| 2017 | 4.50835 |
| 2016 | 1.45167 |
| 2015 | 5.18637 |
| 2014 | 5.16046 |
| 2013 | 1.21301 |
| 2012 | 2.448 |
| 2011 | 4.81601 |
| 2010 | 13.1735 |
| 2009 | -12.6098 |
| 2008 | -2.14705 |
| 2007 | 2.56326 |
| 2006 | 6.42026 |
| 2005 | 6.4913 |
| 2004 | 10.9814 |
| 2003 | 5.12448 |
| 2002 | 3.66953 |
| 2001 | -2.46129 |
| 2000 | 12.9997 |
| 1999 | 11.5942 |
| 1998 | 11.6887 |
| 1997 | 13.4675 |
| 1996 | 8.69641 |
| 1995 | 8.00091 |
| 1994 | 11.9283 |
| 1993 | 8.64664 |
| 1992 | 7.00972 |
| 1991 | -0.149521 |
| 1990 | 3.57706 |
| 1989 | 4.40372 |
| 1988 | 3.92808 |
| 1987 | 5.94283 |
| 1986 | 8.52933 |
| 1985 | 6.48957 |
| 1984 | 24.3432 |
| 1983 | 12.6187 |
| 1982 | -1.27264 |
| 1981 | 2.6115 |
| 1980 | -6.65612 |
| 1979 | 1.66283 |
| 1978 | 8.66681 |
| 1977 | 10.9322 |
| 1976 | 19.5535 |
| 1975 | -11.1142 |
| 1974 | -2.2654 |
| 1973 | 4.64028 |
| 1972 | 11.2532 |
| 1971 | 5.33702 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |