| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 301 | 29 |
| 2015 | 282 | 35 |
| 2014 | 311 | 36 |
| 2013 | 336 | 35 |
| 2012 | 365 | 32 |
| 2011 | 426 | 30 |
| 2010 | 429 | 29 |
| 2009 | 429 | 29 |
| 2008 | 420 | 30 |
| 2007 | 380 | 31 |
| 2006 | 365 | 29 |
| 2005 | 365 | 29 |
| 2004 | 335 | 30 |
| 2003 | 291 | 32 |
| 2002 | 249 | 30 |
| 2001 | 341 | 21 |
| 2000 | 299 | 24 |
| 1999 | 313 | 25 |
| 1998 | 533 | 15 |
| 1997 | 600 | 12 |
| 1996 | 513 | 15 |
| 1995 | 349 | 24 |
| 1994 | 357 | 20 |
| 1993 | 328 | 21 |
| 1992 | 788 | 7 |
| 1991 | 535 | 14 |
| 1990 | 538 | 14 |
| 1989 | 326 | 23 |
| 1988 | 331 | 22 |
| 1987 | 276 | 23 |
| 1986 | 68 | 39 |