| 年份 | 美国 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 101.192 |
| 2020 | 100.51 |
| 2019 | 100.063 |
| 2018 | 99.2756 |
| 2017 | 98.9523 |
| 2016 | 98.7699 |
| 2015 | 97.6525 |
| 2014 | 96.9245 |
| 2013 | 96.1865 |
| 2012 | - |
| 2011 | - |
| 2010 | - |
| 2009 | - |
| 2008 | - |
| 2007 | - |
| 2006 | - |
| 2005 | 95.0525 |
| 2004 | - |
| 2003 | - |
| 2002 | - |
| 2001 | - |
| 2000 | - |
| 1999 | 94.4192 |
| 1998 | 94.4902 |
| 1997 | - |
| 1996 | 93.952 |
| 1995 | 94.2294 |
| 1994 | 96.1809 |
| 1993 | 96.2624 |
| 1992 | - |
| 1991 | 94.9064 |
| 1990 | 96.0541 |
| 1989 | - |
| 1988 | - |
| 1987 | 97.3239 |
| 1986 | 96.9227 |
| 1985 | 96.3456 |
| 1984 | 98.1367 |
| 1983 | 97.4935 |
| 1982 | 98.4854 |
| 1981 | 95.3458 |
| 1980 | 96.3817 |
| 1979 | 82.3985 |
| 1978 | 88.0493 |
| 1977 | 87.8749 |
| 1976 | 87.3809 |
| 1975 | 87.0955 |
| 1974 | 87.1072 |
| 1973 | - |
| 1972 | 87.3712 |
| 1971 | 86.1327 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |