| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2011 | 162010 | 1 |
| 2010 | 144246 | 1 |
| 2009 | 152112 | 1 |
| 2008 | 192989 | 1 |
| 2007 | 170157 | 1 |
| 2006 | 135535 | 1 |
| 2005 | 126656 | 1 |
| 2004 | 123382 | 1 |
| 2003 | 108978 | 1 |
| 2002 | 89061 | 1 |
| 2001 | 82553 | 1 |
| 2000 | 82535 | 1 |
| 1999 | 91384 | 1 |
| 1998 | 93093 | 1 |
| 1997 | 90883 | 1 |
| 1996 | 101329 | 1 |
| 1995 | 101993 | 1 |
| 1994 | 89404 | 1 |
| 1993 | 85422 | 1 |
| 1992 | 91654 | 1 |
| 1991 | 83733 | 1 |
| 1990 | 84287 | 1 |
| 1989 | 68577 | 1 |
| 1988 | 68434 | 1 |
| 1987 | 63043 | 1 |
| 1986 | 52175 | 1 |