| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 33608 | 2 |
| 2015 | 34065 | 4 |
| 2014 | 33775 | 4 |
| 2013 | 33598 | 4 |
| 2012 | 33703 | 4 |
| 2011 | 33543 | 3 |
| 2010 | 33793 | 4 |
| 2009 | 34006 | 3 |
| 2008 | 34239 | 3 |
| 2007 | 34394 | 4 |
| 2006 | 34145 | 4 |
| 2005 | 33761 | 3 |
| 2004 | 34309 | 3 |
| 2003 | 34493 | 3 |
| 2002 | 34133 | 3 |
| 2001 | 33025 | 3 |
| 2000 | 32191 | 2 |
| 1999 | 31297 | 2 |
| 1998 | 29930 | 2 |
| 1997 | 29639 | 2 |
| 1996 | 29242 | 2 |
| 1995 | 29060 | 2 |
| 1994 | 27293 | 2 |
| 1993 | 26592 | 2 |
| 1992 | 26409 | 2 |
| 1991 | 27401 | 2 |
| 1990 | 25948 | 2 |
| 1989 | 25318 | 2 |
| 1988 | 24387 | 2 |
| 1987 | 23180 | 2 |
| 1986 | 22308 | 3 |