| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 24068 | 31 |
| 2015 | 22289 | 37 |
| 2014 | 22648 | 40 |
| 2013 | 21916 | 45 |
| 2012 | 21308 | 49 |
| 2011 | 20939 | 53 |
| 2010 | 19278 | 51 |
| 2009 | 16988 | 50 |
| 2008 | 18131 | 56 |
| 2007 | 17814 | 52 |
| 2006 | 17026 | 51 |
| 2005 | 16532 | 50 |
| 2004 | 15388 | 50 |
| 2003 | 14120 | 50 |
| 2002 | 13750 | 45 |
| 2001 | 13448 | 42 |
| 2000 | 14941 | 40 |
| 1999 | 13819 | 44 |
| 1998 | 12840 | 43 |
| 1997 | 14040 | 40 |
| 1996 | 13650 | 41 |
| 1995 | 13129 | 38 |
| 1994 | 12160 | 37 |
| 1993 | 11251 | 38 |
| 1992 | 10778 | 40 |
| 1991 | 9136 | 39 |
| 1990 | 8216 | 43 |
| 1989 | 7614 | 43 |
| 1988 | 6369 | 43 |
| 1987 | 5350 | 44 |
| 1986 | 4038 | 50 |
| 1985 | 3315 | |
| 1984 | 3225 | |
| 1983 | 2904 | |
| 1982 | 2700 | |
| 1981 | 2721 | |
| 1980 | 2389 | |
| 1979 | 1950 | |
| 1978 | 1606 | |
| 1977 | 1330 | |
| 1976 | 1158 | |
| 1975 | 985 | |
| 1974 | 934 | |
| 1973 | 706 | |
| 1972 | 530 | |
| 1971 | 451 | |
| 1970 | 397 | |
| 1969 | 357 | |
| 1968 | 319 | |
| 1967 | 281 | |
| 1966 | 249 | |
| 1965 | 229 | |
| 1964 | 214 | |
| 1963 | 189 | |
| 1962 | 172 | |
| 1961 | 161 | |
| 1960 | 163 | |
| 1959 | 140 | |
| 1958 | 185 | |
| 1957 | 170 | |
| 1956 | 151 | |
| 1955 | 216 | |
| 1954 | 188 | |
| 1953 | 178 | |
| 1952 | 208 | |
| 1951 | 154 |