年份 | 美国 |
---|---|
2023 | - |
2022 | 83.084 |
2021 | 82.873 |
2020 | 82.664 |
2019 | 82.459 |
2018 | 82.256 |
2017 | 82.058 |
2016 | 81.862 |
2015 | 81.671 |
2014 | 81.483 |
2013 | 81.299 |
2012 | 81.119 |
2011 | 80.944 |
2010 | 80.772 |
2009 | 80.606 |
2008 | 80.438 |
2007 | 80.269 |
2006 | 80.099 |
2005 | 79.928 |
2004 | 79.757 |
2003 | 79.583 |
2002 | 79.409 |
2001 | 79.234 |
2000 | 79.057 |
1999 | 78.742 |
1998 | 78.377 |
1997 | 78.008 |
1996 | 77.636 |
1995 | 77.257 |
1994 | 76.875 |
1993 | 76.488 |
1992 | 76.097 |
1991 | 75.701 |
1990 | 75.3 |
1989 | 75.089 |
1988 | 74.942 |
1987 | 74.793 |
1986 | 74.644 |
1985 | 74.494 |
1984 | 74.344 |
1983 | 74.194 |
1982 | 74.042 |
1981 | 73.89 |
1980 | 73.738 |
1979 | 73.692 |
1978 | 73.682 |
1977 | 73.673 |
1976 | 73.663 |
1975 | 73.653 |
1974 | 73.643 |
1973 | 73.633 |
1972 | 73.623 |
1971 | 73.613 |
1970 | 73.602 |
1969 | 73.333 |
1968 | 72.974 |
1967 | 72.612 |
1966 | 72.247 |
1965 | 71.879 |
1964 | 71.508 |
1963 | 71.134 |
1962 | 70.757 |
1961 | 70.377 |
1960 | 69.996 |