| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 22 | 100 |
| 2015 | 24 | 109 |
| 2014 | 24 | 112 |
| 2013 | 24 | 112 |
| 2012 | 22 | 112 |
| 2011 | 14 | 118 |
| 2010 | 7 | 132 |
| 2006 | 12 | 118 |
| 2005 | 10 | 116 |
| 2004 | 20 | 100 |
| 2003 | 15 | 103 |
| 2002 | 54 | 60 |
| 2001 | 23 | 83 |
| 2000 | 28 | 80 |
| 1999 | 22 | 85 |
| 1998 | 26 | 79 |
| 1997 | 27 | 80 |
| 1996 | 25 | 79 |
| 1995 | 23 | 77 |
| 1994 | 22 | 76 |
| 1993 | 23 | 77 |
| 1992 | 28 | 65 |
| 1991 | 36 | 60 |
| 1990 | 41 | 56 |
| 1989 | 41 | 54 |
| 1988 | 42 | 54 |
| 1987 | 42 | 52 |
| 1986 | 38 | 47 |