| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2015 | 3005 | 90 |
| 2014 | 2956 | 91 |
| 2013 | 2980 | 93 |
| 2012 | 2952 | 94 |
| 2011 | 2919 | 91 |
| 2010 | 2999 | 98 |
| 2009 | 2789 | 89 |
| 2008 | 2712 | 91 |
| 2007 | 2747 | 87 |
| 2006 | 2771 | 82 |
| 2005 | 2688 | 78 |
| 2004 | 2445 | 81 |
| 2003 | 2280 | 82 |
| 2002 | 2298 | 80 |
| 2001 | 2288 | 74 |
| 2000 | 2272 | 73 |
| 1999 | 1896 | 75 |
| 1998 | 1840 | 75 |
| 1997 | 1756 | 78 |
| 1996 | 1779 | 78 |
| 1995 | 1609 | 78 |
| 1994 | 1309 | 77 |
| 1993 | 1524 | 72 |
| 1992 | 1390 | 70 |
| 1991 | 1336 | 71 |
| 1990 | 1311 | 71 |
| 1989 | 1087 | 64 |
| 1988 | 1052 | 61 |
| 1987 | 1295 | 57 |
| 1986 | 1326 | 56 |