| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 156 | 49 |
| 2015 | 156 | 53 |
| 2014 | 147 | 59 |
| 2013 | 133 | 64 |
| 2012 | 117 | 67 |
| 2011 | 103 | 70 |
| 2010 | 86 | 73 |
| 2009 | 79 | 75 |
| 2008 | 65 | 85 |
| 2007 | 52 | 88 |
| 2006 | 42 | 90 |
| 2005 | 35 | 91 |
| 2004 | 31 | 89 |
| 2003 | 27 | 86 |
| 2002 | 25 | 86 |
| 2001 | 22 | 84 |
| 2000 | 18 | 91 |
| 1999 | 17 | 93 |
| 1998 | 14 | 94 |
| 1997 | 13 | 99 |
| 1996 | 12 | 102 |
| 1995 | 10 | 103 |
| 1994 | 8 | 102 |
| 1993 | 8 | 105 |
| 1992 | 9 | 97 |
| 1991 | 8 | 98 |
| 1990 | 8 | 99 |
| 1989 | 8 | 90 |