年份 | 美国 |
---|---|
2023 | - |
2022 | 0.377565 |
2021 | 0.156747 |
2020 | 0.964348 |
2019 | 0.455381 |
2018 | 0.526435 |
2017 | 0.632644 |
2016 | 0.724676 |
2015 | 0.736217 |
2014 | 0.733362 |
2013 | 0.69286 |
2012 | 0.7336 |
2011 | 0.726787 |
2010 | 0.829617 |
2009 | 0.876651 |
2008 | 0.945865 |
2007 | 0.951055 |
2006 | 0.964254 |
2005 | 0.921713 |
2004 | 0.925484 |
2003 | 0.859482 |
2002 | 0.927797 |
2001 | 0.989741 |
2000 | 1.11277 |
1999 | 1.14834 |
1998 | 1.16571 |
1997 | 1.20396 |
1996 | 1.16341 |
1995 | 1.19079 |
1994 | 1.2263 |
1993 | 1.31868 |
1992 | 1.38689 |
1991 | 1.33626 |
1990 | 1.12965 |
1989 | 0.944406 |
1988 | 0.907999 |
1987 | 0.893829 |
1986 | 0.924164 |
1985 | 0.886129 |
1984 | 0.865817 |
1983 | 0.914379 |
1982 | 0.953318 |
1981 | 0.981415 |
1980 | 0.95959 |
1979 | 1.10358 |
1978 | 1.05957 |
1977 | 1.00577 |
1976 | 0.95022 |
1975 | 0.985986 |
1974 | 0.91366 |
1973 | 0.954477 |
1972 | 1.07052 |
1971 | 1.26433 |
1970 | 1.165 |
1969 | 0.977243 |
1968 | 0.998461 |
1967 | 1.08888 |
1966 | 1.15489 |
1965 | 1.25017 |
1964 | 1.38905 |
1963 | 1.43916 |
1962 | 1.538 |
1961 | 1.65773 |
1960 | - |