| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 2 | 135 |
| 2015 | 2 | 144 |
| 2014 | 3 | 147 |
| 2013 | 3 | 149 |
| 2012 | 3 | 149 |
| 2011 | 3 | 143 |
| 2010 | 3 | 144 |
| 2009 | 3 | 144 |
| 2008 | 5 | 140 |
| 2007 | 4 | 141 |
| 2006 | 3 | 144 |
| 2005 | 3 | 148 |
| 2004 | 3 | 147 |
| 2003 | 4 | 136 |
| 2002 | 3 | 138 |
| 2001 | 4 | 128 |
| 2000 | 3 | 132 |
| 1999 | 3 | 126 |
| 1998 | 3 | 129 |
| 1997 | 4 | 123 |
| 1996 | 4 | 125 |
| 1995 | 2 | 135 |
| 1994 | 2 | 128 |
| 1993 | 3 | 127 |
| 1992 | 2 | 122 |
| 1991 | 3 | 112 |
| 1990 | 3 | 112 |
| 1989 | 3 | 108 |
| 1988 | 3 | 106 |
| 1987 | 3 | 103 |
| 1986 | 5 | 91 |