| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 14353 | 49 |
| 2015 | 13567 | 55 |
| 2014 | 12888 | 62 |
| 2013 | 12225 | 70 |
| 2012 | 12565 | 68 |
| 2011 | 11929 | 70 |
| 2010 | 12127 | 64 |
| 2009 | 13012 | 60 |
| 2008 | 14703 | 63 |
| 2007 | 14252 | 60 |
| 2006 | 12724 | 61 |
| 2005 | 11372 | 58 |
| 2004 | 10353 | 57 |
| 2003 | 9740 | 55 |
| 2002 | 9387 | 54 |
| 2001 | 9358 | 52 |
| 2000 | 9875 | 53 |
| 1999 | 9363 | 53 |
| 1998 | 9115 | 51 |
| 1997 | 8755 | 50 |
| 1996 | 8380 | 51 |
| 1995 | 7841 | 50 |
| 1994 | 8219 | 45 |
| 1993 | 7652 | 46 |
| 1992 | 7297 | 48 |
| 1991 | 7157 | 48 |
| 1990 | 6889 | 49 |
| 1989 | 6586 | 44 |
| 1988 | 5945 | 44 |
| 1987 | 4970 | 47 |
| 1986 | 4221 | 47 |