| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2013 | 12237 | 69 |
| 2012 | 12755 | 67 |
| 2011 | 10742 | 73 |
| 2010 | 13545 | 59 |
| 2009 | 11536 | 65 |
| 2008 | 11227 | 68 |
| 2007 | 8319 | 76 |
| 2006 | 6736 | 78 |
| 2005 | 5433 | 78 |
| 2004 | 4271 | 86 |
| 2003 | 3233 | 91 |
| 2002 | 3656 | 84 |
| 2001 | 4926 | 69 |
| 2000 | 4784 | 72 |
| 1999 | 4077 | 76 |
| 1998 | 3875 | 76 |
| 1997 | 3715 | 74 |
| 1996 | 3014 | 84 |
| 1995 | 3376 | 76 |
| 1994 | 2602 | 79 |
| 1993 | 2734 | 76 |
| 1992 | 2810 | 72 |
| 1991 | 2545 | 75 |
| 1990 | 2368 | 77 |
| 1989 | 2172 | 73 |
| 1988 | 3089 | 58 |
| 1987 | 2459 | 63 |
| 1986 | 3272 | 54 |