| 时间 | 值 （美元） | 世界排名 |
|---|---|---|
| 2016 | 12449 | 55 |
| 2015 | 13467 | 57 |
| 2014 | 12245 | 65 |
| 2013 | 12977 | 67 |
| 2012 | 12970 | 64 |
| 2011 | 12727 | 68 |
| 2010 | 10276 | 74 |
| 2009 | 8161 | 77 |
| 2008 | 8953 | 78 |
| 2007 | 7194 | 81 |
| 2006 | 5879 | 81 |
| 2005 | 5077 | 86 |
| 2004 | 4252 | 87 |
| 2003 | 3330 | 90 |
| 2002 | 2579 | 93 |
| 2001 | 7171 | 57 |
| 2000 | 7669 | 58 |
| 1999 | 7736 | 57 |
| 1998 | 8249 | 52 |
| 1997 | 8173 | 52 |
| 1996 | 7684 | 53 |
| 1995 | 7373 | 52 |
| 1994 | 7449 | 48 |
| 1993 | 6940 | 49 |
| 1992 | 6798 | 50 |
| 1991 | 5716 | 51 |
| 1990 | 4319 | 57 |
| 1989 | 2375 | 66 |
| 1988 | 3969 | 54 |
| 1987 | 3547 | 53 |
| 1986 | 3595 | 53 |