| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 7351 | 74 |
| 2015 | 6993 | 83 |
| 2014 | 7853 | 84 |
| 2013 | 7675 | 87 |
| 2012 | 7378 | 89 |
| 2011 | 7814 | 87 |
| 2010 | 6843 | 90 |
| 2009 | 6956 | 86 |
| 2008 | 7296 | 85 |
| 2007 | 5933 | 93 |
| 2006 | 4513 | 96 |
| 2005 | 3894 | 94 |
| 2004 | 3382 | 96 |
| 2003 | 2710 | 100 |
| 2002 | 2088 | 108 |
| 2001 | 1765 | 108 |
| 2000 | 1609 | 114 |
| 1999 | 1644 | 107 |
| 1998 | 1772 | 109 |
| 1997 | 1347 | 120 |
| 1996 | 1209 | 122 |
| 1995 | 1554 | 109 |
| 1994 | 1148 | 113 |
| 1993 | 1278 | 102 |
| 1992 | 1212 | 103 |
| 1991 | 1268 | 102 |
| 1990 | 2367 | 78 |
| 1989 | 2477 | 64 |
| 1988 | 2511 | 63 |
| 1987 | 3132 | 57 |
| 1986 | 2260 | 64 |