| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 505 | 17 |
| 2015 | 485 | 20 |
| 2014 | 502 | 25 |
| 2013 | 476 | 26 |
| 2012 | 447 | 28 |
| 2011 | 496 | 25 |
| 2010 | 541 | 24 |
| 2009 | 448 | 27 |
| 2008 | 484 | 26 |
| 2007 | 596 | 20 |
| 2006 | 523 | 21 |
| 2005 | 524 | 20 |
| 2004 | 512 | 20 |
| 2003 | 440 | 21 |
| 2002 | 344 | 22 |
| 2001 | 363 | 20 |
| 2000 | 294 | 25 |
| 1999 | 327 | 23 |
| 1998 | 337 | 24 |
| 1997 | 320 | 27 |
| 1996 | 342 | 26 |
| 1995 | 348 | 25 |
| 1994 | 313 | 24 |
| 1993 | 272 | 25 |
| 1992 | 314 | 23 |
| 1991 | 278 | 26 |
| 1990 | 253 | 28 |
| 1989 | 201 | 30 |
| 1988 | 230 | 28 |
| 1987 | 197 | 27 |
| 1986 | 145 | 30 |