| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 2760 | 72 |
| 2015 | 2742 | 92 |
| 2014 | 2989 | 90 |
| 2013 | 2972 | 94 |
| 2012 | 2957 | 93 |
| 2011 | 2717 | 97 |
| 2010 | 2639 | 107 |
| 2009 | 2531 | 95 |
| 2008 | 2629 | 93 |
| 2007 | 2474 | 94 |
| 2006 | 2166 | 93 |
| 2005 | 1985 | 91 |
| 2004 | 1813 | 92 |
| 2003 | 1655 | 93 |
| 2002 | 1535 | 93 |
| 2001 | 1402 | 90 |
| 2000 | 1294 | 89 |
| 1999 | 1187 | 88 |
| 1998 | 1164 | 89 |
| 1997 | 1096 | 90 |
| 1996 | 1011 | 91 |
| 1995 | 959 | 91 |
| 1994 | 861 | 89 |
| 1993 | 796 | 87 |
| 1992 | 1062 | 78 |
| 1991 | 1207 | 73 |
| 1990 | 1249 | 73 |