| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 480 | 19 |
| 2015 | 461 | 21 |
| 2014 | 589 | 19 |
| 2013 | 616 | 19 |
| 2012 | 569 | 22 |
| 2011 | 491 | 26 |
| 2010 | 411 | 32 |
| 2009 | 361 | 35 |
| 2008 | 394 | 32 |
| 2007 | 305 | 36 |
| 2006 | 241 | 36 |
| 2005 | 190 | 40 |
| 2004 | 145 | 45 |
| 2003 | 117 | 46 |
| 2002 | 96 | 47 |
| 2001 | 80 | 51 |
| 2000 | 63 | 56 |
| 1999 | 44 | 60 |
| 1998 | 54 | 57 |
| 1997 | 119 | 42 |
| 1996 | 107 | 43 |
| 1995 | 108 | 42 |
| 1994 | 129 | 34 |
| 1993 | 132 | 33 |
| 1992 | 147 | 33 |