| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 9474 | 62 |
| 2015 | 8959 | 72 |
| 2014 | 10020 | 74 |
| 2013 | 9585 | 80 |
| 2012 | 8558 | 82 |
| 2011 | 9200 | 80 |
| 2010 | 8297 | 82 |
| 2009 | 8220 | 76 |
| 2008 | 10136 | 72 |
| 2007 | 8214 | 77 |
| 2006 | 5829 | 84 |
| 2005 | 4676 | 91 |
| 2004 | 3553 | 94 |
| 2003 | 2775 | 98 |
| 2002 | 2125 | 105 |
| 2001 | 1840 | 104 |
| 2000 | 1668 | 108 |
| 1999 | 1610 | 110 |
| 1998 | 1865 | 104 |
| 1997 | 1589 | 111 |
| 1996 | 1644 | 108 |
| 1995 | 1660 | 105 |
| 1994 | 1323 | 105 |
| 1993 | 1158 | 108 |
| 1992 | 1102 | 108 |
| 1991 | 1261 | 103 |
| 1990 | 1681 | 89 |
| 1989 | 1818 | 81 |
| 1988 | 1770 | 79 |
| 1987 | 1674 | 78 |