| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 537 | 16 |
| 2015 | 550 | 16 |
| 2014 | 676 | 16 |
| 2013 | 680 | 17 |
| 2012 | 656 | 16 |
| 2011 | 669 | 17 |
| 2010 | 628 | 19 |
| 2009 | 544 | 22 |
| 2008 | 653 | 19 |
| 2007 | 698 | 17 |
| 2006 | 614 | 17 |
| 2005 | 611 | 16 |
| 2004 | 613 | 14 |
| 2003 | 592 | 15 |
| 2002 | 488 | 15 |
| 2001 | 464 | 14 |
| 2000 | 540 | 13 |
| 1999 | 581 | 12 |
| 1998 | 580 | 12 |
| 1997 | 588 | 13 |
| 1996 | 702 | 9 |
| 1995 | 649 | 11 |
| 1994 | 587 | 10 |
| 1993 | 575 | 10 |
| 1992 | 740 | 9 |
| 1991 | 722 | 11 |
| 1990 | 721 | 10 |
| 1989 | 593 | 10 |
| 1988 | 583 | 11 |
| 1987 | 532 | 10 |
| 1986 | 427 | 9 |