| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 8 | 123 |
| 2015 | 8 | 132 |
| 2014 | 10 | 135 |
| 2013 | 10 | 130 |
| 2012 | 9 | 131 |
| 2011 | 9 | 130 |
| 2010 | 8 | 130 |
| 2009 | 8 | 131 |
| 2008 | 8 | 132 |
| 2007 | 8 | 122 |
| 2006 | 5 | 138 |
| 2005 | 6 | 133 |
| 2004 | 5 | 130 |
| 2003 | 4 | 139 |
| 2002 | 3 | 137 |
| 2001 | 3 | 133 |
| 2000 | 3 | 134 |
| 1999 | 4 | 124 |
| 1998 | 4 | 124 |
| 1997 | 4 | 124 |
| 1996 | 4 | 123 |
| 1995 | 4 | 121 |
| 1994 | 3 | 123 |
| 1993 | 5 | 119 |
| 1992 | 5 | 111 |
| 1991 | 8 | 102 |
| 1990 | 10 | 94 |
| 1989 | 8 | 93 |
| 1988 | 7 | 98 |
| 1987 | 6 | 97 |
| 1986 | 6 | 90 |