| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 62 | 111 |
| 2015 | 58 | 115 |
| 2014 | 68 | 115 |
| 2013 | 61 | 120 |
| 2012 | 66 | 116 |
| 2011 | 63 | 119 |
| 2010 | 51 | 116 |
| 2009 | 45 | 114 |
| 2008 | 53 | 112 |
| 2007 | 48 | 110 |
| 2006 | 43 | 106 |
| 2005 | 37 | 104 |
| 2004 | 36 | 98 |
| 2003 | 32 | 94 |
| 2002 | 26 | 95 |
| 2001 | 25 | 98 |
| 2000 | 34 | 85 |
| 1999 | 28 | 93 |
| 1998 | 27 | 96 |
| 1997 | 26 | 95 |
| 1996 | 28 | 89 |
| 1995 | 29 | 83 |
| 1994 | 24 | 80 |
| 1993 | 22 | 77 |
| 1992 | 23 | 75 |
| 1991 | 21 | 69 |
| 1990 | 20 | 72 |
| 1989 | 15 | 82 |
| 1988 | 14 | 80 |
| 1987 | 11 | 88 |
| 1986 | 9 | 94 |