| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 8890 | 64 |
| 2015 | 9479 | 68 |
| 2014 | 14349 | 58 |
| 2013 | 15544 | 59 |
| 2012 | 15154 | 57 |
| 2011 | 14212 | 62 |
| 2010 | 10675 | 71 |
| 2009 | 8563 | 73 |
| 2008 | 11635 | 67 |
| 2007 | 9101 | 73 |
| 2006 | 6920 | 76 |
| 2005 | 5323 | 82 |
| 2004 | 4102 | 89 |
| 2003 | 2975 | 94 |
| 2002 | 2375 | 97 |
| 2001 | 2100 | 97 |
| 2000 | 1772 | 105 |
| 1999 | 1331 | 121 |
| 1998 | 1835 | 106 |
| 1997 | 2738 | 88 |
| 1996 | 2644 | 88 |
| 1995 | 2666 | 86 |
| 1994 | 2663 | 77 |
| 1993 | 2929 | 70 |
| 1992 | 3096 | 67 |
| 1991 | 3485 | 62 |
| 1990 | 3485 | 61 |
| 1989 | 3429 | 57 |