| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 5786 | 51 |
| 2015 | 5940 | 63 |
| 2014 | 5765 | 63 |
| 2013 | 6038 | 64 |
| 2012 | 5779 | 65 |
| 2011 | 5396 | 67 |
| 2010 | 5189 | 76 |
| 2009 | 5162 | 67 |
| 2008 | 4976 | 67 |
| 2007 | 4947 | 67 |
| 2006 | 4910 | 62 |
| 2005 | 4800 | 60 |
| 2004 | 4903 | 59 |
| 2003 | 4443 | 59 |
| 2002 | 3909 | 62 |
| 2001 | 3958 | 58 |
| 2000 | 3877 | 57 |
| 1999 | 4257 | 50 |
| 1998 | 4478 | 50 |
| 1997 | 5080 | 45 |
| 1996 | 4606 | 47 |
| 1995 | 4240 | 46 |
| 1994 | 4570 | 43 |
| 1993 | 5092 | 38 |
| 1992 | 4468 | 41 |
| 1991 | 3756 | 42 |
| 1990 | 3931 | 41 |
| 1989 | 3859 | 38 |