年份 | 美国 |
---|---|
2023 | - |
2022 | - |
2021 | - |
2020 | - |
2019 | - |
2018 | - |
2017 | - |
2016 | - |
2015 | - |
2014 | - |
2013 | - |
2012 | - |
2011 | - |
2010 | - |
2009 | - |
2008 | - |
2007 | 271.345 |
2006 | 270.102 |
2005 | 268.893 |
2004 | 267.717 |
2003 | 266.618 |
2002 | 265.5 |
2001 | 259.298 |
2000 | 256.81 |
1999 | 254.275 |
1998 | 249.726 |
1997 | 246.083 |
1996 | 243.41 |
1995 | 238.899 |
1994 | 238.049 |
1993 | 236.28 |
1992 | 233.861 |
1991 | 235.13 |
1990 | 238.41 |
1989 | 241.624 |
1988 | 244.882 |
1987 | 257.831 |
1986 | 251.911 |
1985 | 248.715 |
1984 | 249.035 |
1983 | 248.768 |
1982 | 248.662 |
1981 | 248.841 |
1980 | 250.377 |
1979 | 258.536 |
1978 | 264.311 |
1977 | 270.702 |
1976 | 272.963 |
1975 | 274.572 |
1974 | 276.449 |
1973 | 276.931 |
1972 | 277.533 |
1971 | 278.25 |
1970 | 279.227 |
1969 | 280.326 |
1968 | 297.79 |
1967 | 312.344 |
1966 | 311.317 |
1965 | 271.186 |
1964 | 268.759 |
1963 | 264.793 |
1962 | 267.088 |
1961 | 259.647 |
1960 | - |