| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 15377 | 44 |
| 2015 | 17322 | 43 |
| 2014 | 19325 | 48 |
| 2013 | 19608 | 52 |
| 2012 | 19152 | 52 |
| 2011 | 19054 | 54 |
| 2010 | 16684 | 54 |
| 2009 | 14509 | 57 |
| 2008 | 21188 | 52 |
| 2007 | 16530 | 54 |
| 2006 | 14096 | 57 |
| 2005 | 12323 | 56 |
| 2004 | 10291 | 58 |
| 2003 | 8805 | 59 |
| 2002 | 7050 | 62 |
| 2001 | 6936 | 59 |
| 2000 | 6431 | 63 |
| 1999 | 5384 | 66 |
| 1998 | 4787 | 69 |
| 1997 | 4551 | 69 |
| 1996 | 4577 | 67 |
| 1995 | 4246 | 68 |
| 1994 | 3957 | 62 |
| 1993 | 3752 | 61 |
| 1992 | 4396 | 56 |
| 1991 | 4316 | 57 |
| 1990 | 4148 | 58 |
| 1989 | 3562 | 56 |
| 1988 | 3732 | 56 |
| 1987 | 4014 | 50 |
| 1986 | 4049 | 49 |