| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 14658 | 24 |
| 2015 | 15128 | 31 |
| 2014 | 15116 | 31 |
| 2013 | 14596 | 32 |
| 2012 | 14001 | 33 |
| 2011 | 13326 | 34 |
| 2010 | 12245 | 38 |
| 2009 | 11885 | 36 |
| 2008 | 11973 | 37 |
| 2007 | 11580 | 38 |
| 2006 | 10731 | 39 |
| 2005 | 10233 | 38 |
| 2004 | 9883 | 38 |
| 2003 | 9382 | 38 |
| 2002 | 9307 | 38 |
| 2001 | 9003 | 34 |
| 2000 | 9046 | 33 |
| 1999 | 9339 | 32 |
| 1998 | 9309 | 32 |
| 1997 | 9597 | 31 |
| 1996 | 9655 | 31 |
| 1995 | 9472 | 31 |
| 1994 | 9401 | 30 |
| 1993 | 9042 | 29 |
| 1992 | 8678 | 29 |
| 1991 | 8173 | 30 |
| 1990 | 7844 | 31 |
| 1989 | 7677 | 29 |
| 1988 | 7632 | 28 |
| 1987 | 7260 | 29 |
| 1986 | 6968 | 29 |