| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 953 | 8 |
| 2015 | 1016 | 10 |
| 2014 | 1282 | 9 |
| 2013 | 1016 | 11 |
| 2012 | 1029 | 10 |
| 2011 | 1054 | 10 |
| 2010 | 1005 | 11 |
| 2009 | 911 | 13 |
| 2008 | 954 | 13 |
| 2007 | 862 | 12 |
| 2006 | 793 | 12 |
| 2005 | 681 | 12 |
| 2004 | 555 | 19 |
| 2003 | 689 | 12 |
| 2002 | 652 | 11 |
| 2001 | 640 | 9 |
| 2000 | 733 | 8 |
| 1999 | 792 | 8 |
| 1998 | 921 | 7 |
| 1997 | 1183 | 4 |
| 1996 | 1078 | 4 |
| 1995 | 961 | 5 |
| 1994 | 905 | 4 |
| 1993 | 830 | 5 |
| 1992 | 919 | 4 |
| 1991 | 922 | 6 |
| 1990 | 893 | 7 |
| 1989 | 740 | 7 |
| 1988 | 730 | 7 |
| 1987 | 440 | 13 |
| 1986 | 477 | 8 |