| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 112.266 |
| 2020 | 106.467 |
| 2019 | 105.437 |
| 2018 | 109.304 |
| 2017 | 110.404 |
| 2016 | 117.268 |
| 2015 | 123.116 |
| 2014 | 121.21 |
| 2013 | 127.152 |
| 2012 | 133.628 |
| 2011 | 131.05 |
| 2010 | 128.711 |
| 2009 | 135.382 |
| 2008 | 108.366 |
| 2007 | 117.53 |
| 2006 | 128.149 |
| 2005 | 118.475 |
| 2004 | 120.358 |
| 2003 | 130.333 |
| 2002 | 108.693 |
| 2001 | 102.811 |
| 2000 | 106.153 |
| 1999 | 95.383 |
| 1998 | 84.8612 |
| 1997 | 83.4669 |
| 1996 | 74.9435 |
| 1995 | 77.3015 |
| 1994 | 75.9099 |
| 1993 | 78.095 |
| 1992 | 73.8439 |
| 1991 | 73.0167 |
| 1990 | 76.8451 |
| 1989 | 79.1859 |
| 1988 | 75.8421 |
| 1987 | 77.4743 |
| 1986 | 81.8563 |
| 1985 | 101.71 |
| 1984 | 88.4347 |
| 1983 | 94.5564 |
| 1982 | 97.3572 |
| 1981 | 104.916 |
| 1980 | 91.1041 |
| 1979 | 92.3978 |
| 1978 | 94.644 |
| 1977 | 101.213 |
| 1976 | 102.154 |
| 1975 | 97.886 |
| 1974 | 96.6336 |
| 1973 | 96.4529 |
| 1972 | 96.4482 |
| 1971 | 98.0701 |
| 1970 | 96.388 |
| 1969 | 97.5627 |
| 1968 | 97.6147 |
| 1967 | 94.6423 |
| 1966 | 93.2008 |
| 1965 | 90.5368 |
| 1964 | 92.1036 |
| 1963 | 92.3456 |
| 1962 | 93.6282 |
| 1961 | 92.0164 |
| 1960 | - |