| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 19 | 105 |
| 2015 | 17 | 118 |
| 2014 | 19 | 115 |
| 2013 | 19 | 115 |
| 2012 | 19 | 114 |
| 2011 | 19 | 111 |
| 2010 | 16 | 116 |
| 2009 | 17 | 114 |
| 2008 | 22 | 111 |
| 2007 | 16 | 115 |
| 2006 | 15 | 113 |
| 2005 | 15 | 108 |
| 2004 | 14 | 108 |
| 2003 | 13 | 107 |
| 2002 | 10 | 109 |
| 2001 | 10 | 107 |
| 2000 | 16 | 95 |
| 1999 | 12 | 100 |
| 1998 | 11 | 99 |
| 1997 | 10 | 109 |
| 1996 | 11 | 104 |
| 1995 | 16 | 89 |
| 1994 | 9 | 98 |
| 1993 | 7 | 109 |
| 1992 | 10 | 94 |
| 1988 | 15 | 75 |
| 1987 | 15 | 72 |
| 1986 | 14 | 66 |