年份 | 美国 |
---|---|
2023 | - |
2022 | 7.04072 |
2021 | 4.49279 |
2020 | 1.30491 |
2019 | 1.79393 |
2018 | 2.40406 |
2017 | 1.89961 |
2016 | 1.00224 |
2015 | 1.00054 |
2014 | 1.86989 |
2013 | 1.75095 |
2012 | 1.8706 |
2011 | 2.07771 |
2010 | 1.20179 |
2009 | 0.640955 |
2008 | 1.91793 |
2007 | 2.70253 |
2006 | 3.08558 |
2005 | 3.13582 |
2004 | 2.68441 |
2003 | 1.9736 |
2002 | 1.55853 |
2001 | 2.25295 |
2000 | 2.26555 |
1999 | 1.40923 |
1998 | 1.12553 |
1997 | 1.72443 |
1996 | 1.83097 |
1995 | 2.0969 |
1994 | 2.13542 |
1993 | 2.37034 |
1992 | 2.27891 |
1991 | 3.38176 |
1990 | 3.74333 |
1989 | - |
1988 | - |
1987 | - |
1986 | - |
1985 | - |
1984 | - |
1983 | - |
1982 | - |
1981 | - |
1980 | - |
1979 | - |
1978 | - |
1977 | - |
1976 | - |
1975 | - |
1974 | - |
1973 | - |
1972 | - |
1971 | - |
1970 | - |
1969 | - |
1968 | - |
1967 | - |
1966 | - |
1965 | - |
1964 | - |
1963 | - |
1962 | - |
1961 | - |
1960 | - |