| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 13626 | 53 |
| 2015 | 13501 | 56 |
| 2014 | 11894 | 68 |
| 2013 | 10932 | 74 |
| 2012 | 10319 | 75 |
| 2011 | 9704 | 78 |
| 2010 | 8979 | 77 |
| 2009 | 9163 | 71 |
| 2008 | 9793 | 75 |
| 2007 | 9743 | 70 |
| 2006 | 9729 | 66 |
| 2005 | 9711 | 65 |
| 2004 | 8852 | 63 |
| 2003 | 8117 | 63 |
| 2002 | 8353 | 58 |
| 2001 | 8246 | 55 |
| 2000 | 7786 | 57 |
| 1999 | 6011 | 62 |
| 1998 | 6333 | 59 |
| 1997 | 6247 | 57 |
| 1996 | 6116 | 59 |
| 1995 | 5520 | 58 |
| 1994 | 4970 | 56 |
| 1993 | 4645 | 56 |
| 1992 | 5188 | 55 |
| 1991 | 5419 | 53 |
| 1990 | 5096 | 56 |