| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 147 | 50 |
| 2015 | 153 | 54 |
| 2014 | 158 | 57 |
| 2013 | 154 | 59 |
| 2012 | 132 | 59 |
| 2011 | 136 | 59 |
| 2010 | 137 | 58 |
| 2009 | 124 | 66 |
| 2008 | 136 | 66 |
| 2007 | 96 | 69 |
| 2006 | 64 | 76 |
| 2005 | 47 | 79 |
| 2004 | 33 | 85 |
| 2003 | 25 | 91 |
| 2002 | 21 | 90 |
| 2001 | 22 | 85 |
| 2000 | 22 | 85 |
| 1999 | 22 | 82 |
| 1998 | 21 | 85 |
| 1997 | 20 | 90 |
| 1996 | 17 | 85 |
| 1995 | 19 | 83 |
| 1993 | 8 | 106 |
| 1992 | 8 | 98 |