| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 365 | 25 |
| 2015 | 343 | 29 |
| 2014 | 395 | 29 |
| 2013 | 452 | 28 |
| 2012 | 393 | 30 |
| 2011 | 465 | 29 |
| 2010 | 446 | 27 |
| 2009 | 468 | 26 |
| 2008 | 456 | 28 |
| 2007 | 414 | 29 |
| 2006 | 387 | 28 |
| 2005 | 385 | 27 |
| 2004 | 355 | 28 |
| 2003 | 297 | 29 |
| 2002 | 250 | 29 |
| 2001 | 224 | 30 |
| 2000 | 214 | 32 |
| 1999 | 236 | 32 |
| 1998 | 230 | 32 |
| 1997 | 236 | 33 |
| 1996 | 258 | 31 |
| 1995 | 266 | 31 |
| 1994 | 218 | 29 |
| 1993 | 220 | 29 |
| 1992 | 254 | 29 |
| 1991 | 212 | 32 |
| 1990 | 188 | 33 |
| 1989 | 146 | 35 |
| 1988 | 135 | 37 |
| 1987 | 113 | 37 |
| 1986 | 93 | 34 |