| 时间 | 值 （美元/人） | 世界排名 |
|---|---|---|
| 2016 | 5 | 129 |
| 2015 | 5 | 139 |
| 2014 | 4 | 145 |
| 2013 | 4 | 147 |
| 2012 | 4 | 144 |
| 2011 | 4 | 139 |
| 2010 | 4 | 142 |
| 2009 | 4 | 140 |
| 2008 | 5 | 141 |
| 2007 | 5 | 137 |
| 2006 | 4 | 141 |
| 2005 | 4 | 140 |
| 2004 | 4 | 140 |
| 2003 | 4 | 133 |
| 2002 | 4 | 131 |
| 2001 | 5 | 121 |
| 2000 | 9 | 105 |
| 1999 | 12 | 102 |
| 1998 | 8 | 111 |
| 1997 | 4 | 130 |
| 1996 | 2 | 134 |
| 1995 | 2 | 131 |
| 1994 | 3 | 121 |
| 1993 | 4 | 124 |
| 1992 | 5 | 109 |
| 1991 | 11 | 92 |
| 1990 | 16 | 77 |
| 1989 | 17 | 73 |
| 1988 | 14 | 78 |
| 1987 | 11 | 84 |
| 1986 | 10 | 77 |