年份 | 美国 |
---|---|
2023 | - |
2022 | 2.0313 |
2021 | 2.01586 |
2020 | 1.81057 |
2019 | 2.08688 |
2018 | 1.47546 |
2017 | 1.02206 |
2016 | 1.07627 |
2015 | 1.09678 |
2014 | 1.12478 |
2013 | 1.1208 |
2012 | 1.23034 |
2011 | 1.2289 |
2010 | 1.15831 |
2009 | 1.01715 |
2008 | 1.11729 |
2007 | 1.06582 |
2006 | 1.03649 |
2005 | 1.08341 |
2004 | 1.13115 |
2003 | 1.11601 |
2002 | 1.04912 |
2001 | 0.999341 |
2000 | 1.01742 |
1999 | 1.04081 |
1998 | 1.09346 |
1997 | 1.10543 |
1996 | 1.24573 |
1995 | 1.3807 |
1994 | 1.54985 |
1993 | 1.55529 |
1992 | 1.54027 |
1991 | 1.40985 |
1990 | 1.57419 |
1989 | 1.58903 |
1988 | 1.72143 |
1987 | 1.68715 |
1986 | 1.65843 |
1985 | 1.56169 |
1984 | 1.61488 |
1983 | 1.33778 |
1982 | 1.36141 |
1981 | 1.28792 |
1980 | 1.39225 |
1979 | 1.60247 |
1978 | 1.66839 |
1977 | 1.47586 |
1976 | 2.00604 |
1975 | 1.49505 |
1974 | 1.29313 |
1973 | 1.39379 |
1972 | 1.63636 |
1971 | - |
1970 | - |
1969 | - |
1968 | - |
1967 | - |
1966 | - |
1965 | - |
1964 | - |
1963 | - |
1962 | - |
1961 | - |
1960 | - |