| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2015 | 294 | 33 |
| 2014 | 387 | 31 |
| 2013 | 381 | 30 |
| 2012 | 378 | 31 |
| 2011 | 406 | 32 |
| 2010 | 385 | 33 |
| 2009 | 400 | 32 |
| 2008 | 450 | 29 |
| 2007 | 422 | 28 |
| 2006 | 319 | 32 |
| 2005 | 326 | 32 |
| 2004 | 328 | 31 |
| 2003 | 293 | 31 |
| 2002 | 233 | 33 |
| 2001 | 222 | 31 |
| 2000 | 240 | 30 |
| 1999 | 266 | 28 |
| 1998 | 271 | 28 |
| 1997 | 272 | 29 |
| 1996 | 309 | 28 |
| 1995 | 322 | 27 |
| 1994 | 281 | 26 |
| 1993 | 268 | 26 |
| 1992 | 273 | 27 |
| 1991 | 257 | 29 |
| 1990 | 257 | 27 |
| 1989 | 213 | 29 |
| 1988 | 226 | 29 |