年份 | 美国 |
---|---|
2023 | - |
2022 | 1.93563 |
2021 | 5.94548 |
2020 | -2.7678 |
2019 | 2.29444 |
2018 | 2.94538 |
2017 | 2.24192 |
2016 | 1.66747 |
2015 | 2.70637 |
2014 | 2.28778 |
2013 | 1.84188 |
2012 | 2.28069 |
2011 | 1.54989 |
2010 | 2.70886 |
2009 | -2.59989 |
2008 | 0.122188 |
2007 | 2.01051 |
2006 | 2.78281 |
2005 | 3.48322 |
2004 | 3.85255 |
2003 | 2.79621 |
2002 | 1.69594 |
2001 | 0.954339 |
2000 | 4.07716 |
1999 | 4.7945 |
1998 | 4.48139 |
1997 | 4.44718 |
1996 | 3.77257 |
1995 | 2.68422 |
1994 | 4.02879 |
1993 | 2.75178 |
1992 | 3.52244 |
1991 | -0.108265 |
1990 | 1.88596 |
1989 | 3.67265 |
1988 | 4.17706 |
1987 | 3.45925 |
1986 | 3.46265 |
1985 | 4.16966 |
1984 | 7.23663 |
1983 | 4.58391 |
1982 | -1.80289 |
1981 | 2.53772 |
1980 | -0.25675 |
1979 | 3.16615 |
1978 | 5.53531 |
1977 | 4.62415 |
1976 | 5.38814 |
1975 | -0.205456 |
1974 | -0.540552 |
1973 | 5.64572 |
1972 | 5.25891 |
1971 | 3.29335 |
1970 | -0.283491 |
1969 | 3.1 |
1968 | 4.8 |
1967 | 2.5 |
1966 | 6.5 |
1965 | 6.4 |
1964 | 5.8 |
1963 | 4.4 |
1962 | 6.1 |
1961 | 2.3 |
1960 | - |