| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2015 | 7602 | 80 |
| 2014 | 7051 | 90 |
| 2013 | 6760 | 97 |
| 2012 | 6426 | 97 |
| 2011 | 6076 | 99 |
| 2010 | 5676 | 99 |
| 2009 | 5485 | 95 |
| 2008 | 5376 | 101 |
| 2007 | 5184 | 97 |
| 2006 | 4669 | 95 |
| 2005 | 3779 | 95 |
| 2004 | 3391 | 95 |
| 2003 | 3193 | 92 |
| 2002 | 2994 | 90 |
| 2001 | 2832 | 89 |
| 2000 | 2741 | 91 |
| 1999 | 2553 | 91 |
| 1998 | 2326 | 92 |
| 1997 | 2303 | 96 |
| 1996 | 2282 | 94 |
| 1995 | 2790 | 85 |
| 1994 | 2622 | 78 |
| 1993 | 2072 | 82 |
| 1992 | 2058 | 80 |
| 1991 | 2280 | 79 |
| 1990 | 2707 | 69 |
| 1989 | 2577 | 63 |
| 1988 | 2645 | 62 |
| 1987 | 2455 | 64 |
| 1986 | 2383 | 62 |