| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 463 | 20 |
| 2015 | 457 | 22 |
| 2014 | 508 | 23 |
| 2013 | 516 | 24 |
| 2012 | 536 | 24 |
| 2011 | 642 | 18 |
| 2010 | 734 | 15 |
| 2009 | 958 | 11 |
| 2008 | 954 | 12 |
| 2007 | 772 | 14 |
| 2006 | 690 | 14 |
| 2005 | 640 | 14 |
| 2004 | 572 | 18 |
| 2003 | 461 | 18 |
| 2002 | 434 | 16 |
| 2001 | 408 | 15 |
| 2000 | 417 | 15 |
| 1999 | 445 | 15 |
| 1998 | 450 | 17 |
| 1997 | 429 | 19 |
| 1996 | 435 | 18 |
| 1995 | 396 | 21 |
| 1994 | 341 | 22 |
| 1993 | 322 | 22 |
| 1992 | 348 | 22 |
| 1991 | 305 | 24 |
| 1990 | 313 | 25 |
| 1989 | 254 | 25 |
| 1988 | 274 | 25 |
| 1987 | 240 | 24 |
| 1986 | 201 | 23 |