| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 446 | 22 |
| 2015 | 423 | 24 |
| 2014 | 504 | 24 |
| 2013 | 480 | 25 |
| 2012 | 475 | 25 |
| 2011 | 474 | 28 |
| 2010 | 444 | 28 |
| 2009 | 377 | 34 |
| 2008 | 390 | 33 |
| 2007 | 406 | 30 |
| 2006 | 350 | 30 |
| 2005 | 336 | 31 |
| 2004 | 319 | 32 |
| 2003 | 296 | 30 |
| 2002 | 234 | 32 |
| 2001 | 204 | 32 |
| 2000 | 215 | 31 |
| 1999 | 248 | 31 |
| 1998 | 250 | 31 |
| 1997 | 298 | 28 |
| 1996 | 335 | 27 |
| 1995 | 316 | 28 |
| 1994 | 279 | 27 |
| 1993 | 248 | 28 |
| 1992 | 244 | 30 |
| 1991 | 276 | 27 |
| 1990 | 318 | 24 |
| 1989 | 288 | 24 |
| 1988 | 288 | 24 |
| 1987 | 297 | 20 |
| 1986 | 215 | 21 |