年份 | 美国 |
---|---|
2023 | - |
2022 | 50.4868 |
2021 | 50.4621 |
2020 | 50.4366 |
2019 | 50.437 |
2018 | 50.4612 |
2017 | 50.4893 |
2016 | 50.5225 |
2015 | 50.5577 |
2014 | 50.5941 |
2013 | 50.6341 |
2012 | 50.6772 |
2011 | 50.7228 |
2010 | 50.7451 |
2009 | 50.7414 |
2008 | 50.7376 |
2007 | 50.7348 |
2006 | 50.7352 |
2005 | 50.7404 |
2004 | 50.7486 |
2003 | 50.7543 |
2002 | 50.751 |
2001 | 50.7514 |
2000 | 50.7692 |
1999 | 50.8019 |
1998 | 50.8372 |
1997 | 50.8652 |
1996 | 50.8883 |
1995 | 50.9113 |
1994 | 50.9347 |
1993 | 50.9567 |
1992 | 50.9821 |
1991 | 51.0137 |
1990 | 51.0442 |
1989 | 51.0727 |
1988 | 51.0991 |
1987 | 51.12 |
1986 | 51.1406 |
1985 | 51.1637 |
1984 | 51.1847 |
1983 | 51.2035 |
1982 | 51.2175 |
1981 | 51.2247 |
1980 | 51.2239 |
1979 | 51.2131 |
1978 | 51.1927 |
1977 | 51.1653 |
1976 | 51.1399 |
1975 | 51.1161 |
1974 | 51.093 |
1973 | 51.0734 |
1972 | 51.0655 |
1971 | 51.0766 |
1970 | 51.1002 |
1969 | 51.1069 |
1968 | 51.0692 |
1967 | 50.979 |
1966 | 50.8525 |
1965 | 50.7353 |
1964 | 50.6574 |
1963 | 50.6042 |
1962 | 50.5494 |
1961 | 50.4911 |
1960 | 50.4387 |