| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 497 | 18 |
| 2015 | 487 | 19 |
| 2014 | 569 | 20 |
| 2013 | 570 | 21 |
| 2012 | 578 | 20 |
| 2011 | 600 | 23 |
| 2010 | 566 | 23 |
| 2009 | 580 | 20 |
| 2008 | 586 | 22 |
| 2007 | 517 | 24 |
| 2006 | 462 | 23 |
| 2005 | 461 | 23 |
| 2004 | 461 | 23 |
| 2003 | 425 | 23 |
| 2002 | 356 | 21 |
| 2001 | 333 | 22 |
| 2000 | 342 | 21 |
| 1999 | 397 | 20 |
| 1998 | 404 | 21 |
| 1997 | 405 | 20 |
| 1996 | 476 | 17 |
| 1995 | 504 | 16 |
| 1994 | 446 | 15 |
| 1993 | 459 | 15 |
| 1992 | 520 | 16 |
| 1991 | 494 | 17 |
| 1990 | 533 | 15 |
| 1989 | 427 | 16 |
| 1988 | 449 | 15 |
| 1987 | 439 | 14 |
| 1986 | 356 | 13 |