| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 6 | 126 |
| 2015 | 6 | 138 |
| 2014 | 6 | 143 |
| 2013 | 6 | 139 |
| 2012 | 6 | 141 |
| 2008 | 5 | 142 |
| 2007 | 6 | 129 |
| 2006 | 6 | 129 |
| 2005 | 7 | 126 |
| 2004 | 6 | 125 |
| 2003 | 6 | 125 |
| 2002 | 7 | 118 |
| 2001 | 8 | 110 |
| 2000 | 7 | 113 |
| 1999 | 8 | 109 |
| 1998 | 9 | 108 |
| 1997 | 10 | 107 |
| 1996 | 8 | 112 |
| 1995 | 7 | 110 |
| 1994 | 7 | 106 |
| 1993 | 6 | 112 |
| 1992 | 7 | 104 |
| 1991 | 8 | 101 |
| 1990 | 7 | 102 |
| 1989 | 7 | 94 |
| 1988 | 7 | 96 |
| 1987 | 6 | 95 |
| 1986 | 7 | 88 |