| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 13680 | 52 |
| 2015 | 13134 | 58 |
| 2014 | 12594 | 64 |
| 2013 | 11686 | 72 |
| 2012 | 10590 | 74 |
| 2011 | 9271 | 79 |
| 2010 | 7937 | 85 |
| 2009 | 7430 | 81 |
| 2008 | 6974 | 88 |
| 2007 | 6068 | 88 |
| 2006 | 5349 | 91 |
| 2005 | 4917 | 88 |
| 2004 | 4592 | 84 |
| 2003 | 4267 | 81 |
| 2002 | 4126 | 77 |
| 2001 | 4046 | 74 |
| 2000 | 4060 | 78 |
| 1999 | 4083 | 75 |
| 1998 | 3975 | 75 |
| 1997 | 3741 | 73 |
| 1996 | 3530 | 75 |
| 1995 | 3494 | 74 |
| 1994 | 3489 | 66 |
| 1993 | 3340 | 65 |
| 1992 | 3122 | 65 |
| 1991 | 2804 | 68 |
| 1990 | 2604 | 70 |
| 1989 | 2446 | 65 |
| 1988 | 2492 | 64 |
| 1987 | 2945 | 59 |
| 1986 | 2997 | 57 |