| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 1147 | 6 |
| 2015 | 1121 | 7 |
| 2014 | 1428 | 8 |
| 2013 | 1455 | 8 |
| 2012 | 1424 | 8 |
| 2011 | 1460 | 8 |
| 2010 | 1329 | 8 |
| 2009 | 1283 | 8 |
| 2008 | 1336 | 9 |
| 2007 | 1248 | 9 |
| 2006 | 1075 | 8 |
| 2005 | 1057 | 8 |
| 2004 | 1064 | 7 |
| 2003 | 990 | 8 |
| 2002 | 896 | 8 |
| 2001 | 657 | 8 |
| 2000 | 651 | 9 |
| 1999 | 742 | 9 |
| 1998 | 750 | 9 |
| 1997 | 738 | 9 |
| 1996 | 807 | 7 |
| 1995 | 805 | 7 |
| 1994 | 785 | 6 |
| 1993 | 736 | 7 |
| 1992 | 887 | 5 |
| 1991 | 771 | 8 |
| 1990 | 800 | 8 |
| 1989 | 694 | 8 |
| 1988 | 688 | 8 |
| 1987 | 658 | 7 |
| 1986 | 520 | 5 |