| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 70812 | 4 |
| 2015 | 74505 | 4 |
| 2014 | 97005 | 3 |
| 2013 | 102910 | 3 |
| 2012 | 101564 | 3 |
| 2011 | 100575 | 4 |
| 2010 | 87647 | 5 |
| 2009 | 80018 | 5 |
| 2008 | 96881 | 4 |
| 2007 | 85129 | 5 |
| 2006 | 74115 | 5 |
| 2005 | 66775 | 5 |
| 2004 | 57570 | 5 |
| 2003 | 50112 | 5 |
| 2002 | 43061 | 6 |
| 2001 | 38550 | 6 |
| 2000 | 38147 | 7 |
| 1999 | 36371 | 7 |
| 1998 | 34789 | 7 |
| 1997 | 36629 | 6 |
| 1996 | 37321 | 7 |
| 1995 | 34875 | 7 |
| 1994 | 29316 | 8 |
| 1993 | 27964 | 7 |
| 1992 | 30524 | 7 |
| 1991 | 28597 | 7 |
| 1990 | 28243 | 7 |
| 1989 | 24281 | 8 |
| 1988 | 24207 | 8 |
| 1987 | 22506 | 7 |
| 1986 | 18883 | 7 |