年份 | 美国 |
---|---|
2023 | - |
2022 | - |
2021 | 0.363208 |
2020 | - |
2019 | - |
2018 | 0.00818926 |
2017 | - |
2016 | - |
2015 | - |
2014 | 0.0523193 |
2013 | - |
2012 | - |
2011 | - |
2010 | - |
2009 | 0.0450658 |
2008 | 0.551541 |
2007 | 0.339351 |
2006 | 0.382513 |
2005 | 0.797237 |
2004 | 0.569511 |
2003 | 0.612792 |
2002 | 0.302756 |
2001 | 0.466751 |
2000 | 0.579476 |
1999 | 0.253383 |
1998 | 0.211303 |
1997 | 0.321971 |
1996 | 0.30164 |
1995 | 0.156583 |
1994 | 0.240785 |
1993 | 0.30727 |
1992 | 0.214793 |
1991 | 0.125303 |
1990 | 0.161038 |
1989 | 0.184318 |
1988 | 0.179156 |
1987 | 0.276863 |
1986 | 0.0997484 |
1985 | 0.459518 |
1984 | 0.620408 |
1983 | 0.582813 |
1982 | 0.187009 |
1981 | 1.00605 |
1980 | 1.73021 |
1979 | 1.82311 |
1978 | 0.676187 |
1977 | 0.779328 |
1976 | 0.779313 |
1975 | 0.834989 |
1974 | 1.02526 |
1973 | 0.107643 |
1972 | 0.045444 |
1971 | 0.00255782 |
1970 | - |
1969 | - |
1968 | - |
1967 | - |
1966 | - |
1965 | - |
1964 | - |
1963 | - |
1962 | - |
1961 | - |
1960 | - |