| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | 162.991 |
| 2019 | 136.83 |
| 2018 | 137.524 |
| 2017 | 139.215 |
| 2016 | 138.505 |
| 2015 | 134.303 |
| 2014 | 131.878 |
| 2013 | 131.259 |
| 2012 | 131.345 |
| 2011 | 132.138 |
| 2010 | 131.884 |
| 2009 | 134.966 |
| 2008 | 136.811 |
| 2007 | 138.605 |
| 2006 | 141.119 |
| 2005 | 141.969 |
| 2004 | 140.559 |
| 2003 | 143.909 |
| 2002 | 144.378 |
| 2001 | 144.307 |
| 2000 | 143.926 |
| 1999 | 144.774 |
| 1998 | 145.506 |
| 1997 | 149.441 |
| 1996 | 158.008 |
| 1995 | 166.964 |
| 1994 | 169.025 |
| 1993 | 170.257 |
| 1992 | 168.459 |
| 1991 | 170.606 |
| 1990 | 172.059 |
| 1989 | 174.804 |
| 1988 | 176.244 |
| 1987 | 176.195 |
| 1986 | 177.915 |
| 1985 | 178.088 |
| 1984 | 177.94 |
| 1983 | 179.711 |
| 1982 | 183.148 |
| 1981 | 190.25 |
| 1980 | 194.955 |
| 1979 | 195.119 |
| 1978 | 199 |
| 1977 | 202.603 |
| 1976 | 206.648 |
| 1975 | 212.742 |
| 1974 | 219.819 |
| 1973 | 228.488 |
| 1972 | 232.026 |
| 1971 | 232.152 |
| 1970 | 236.992 |
| 1969 | 239.492 |
| 1968 | 240.987 |
| 1967 | 234.856 |
| 1966 | 236.639 |
| 1965 | 233.011 |
| 1964 | 232.277 |
| 1963 | 233.559 |
| 1962 | 229.823 |
| 1961 | 226.703 |
| 1960 | 233.293 |