| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 559 | 14 |
| 2015 | 546 | 17 |
| 2014 | 563 | 21 |
| 2013 | 622 | 18 |
| 2012 | 574 | 21 |
| 2011 | 629 | 20 |
| 2010 | 526 | 25 |
| 2009 | 524 | 23 |
| 2008 | 536 | 24 |
| 2007 | 467 | 26 |
| 2006 | 445 | 25 |
| 2005 | 469 | 22 |
| 2004 | 474 | 22 |
| 2003 | 446 | 20 |
| 2002 | 396 | 19 |
| 2001 | 382 | 18 |
| 2000 | 390 | 18 |
| 1999 | 440 | 17 |
| 1998 | 491 | 16 |
| 1997 | 493 | 16 |
| 1996 | 599 | 11 |
| 1995 | 660 | 10 |
| 1994 | 558 | 11 |
| 1993 | 520 | 12 |
| 1992 | 602 | 12 |
| 1991 | 591 | 13 |
| 1990 | 604 | 12 |
| 1989 | 464 | 13 |
| 1988 | 497 | 12 |
| 1987 | 461 | 11 |
| 1986 | 394 | 10 |