| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 19 | 107 |
| 2015 | 18 | 129 |
| 2014 | 22 | 129 |
| 2013 | 24 | 128 |
| 2012 | 28 | 119 |
| 2011 | 35 | 110 |
| 2010 | 38 | 108 |
| 2009 | 41 | 104 |
| 2008 | 50 | 102 |
| 2007 | 44 | 100 |
| 2006 | 36 | 101 |
| 2005 | 33 | 93 |
| 2004 | 31 | 88 |
| 2003 | 26 | 88 |
| 2002 | 21 | 95 |
| 2001 | 18 | 100 |
| 2000 | 18 | 101 |
| 1999 | 20 | 90 |
| 1998 | 20 | 89 |
| 1997 | 19 | 92 |
| 1996 | 20 | 87 |
| 1995 | 20 | 86 |
| 1994 | 17 | 75 |
| 1993 | 16 | 78 |
| 1992 | 18 | 70 |
| 1991 | 15 | 74 |
| 1990 | 14 | 75 |
| 1989 | 12 | 67 |
| 1988 | 12 | 67 |
| 1987 | 10 | 66 |
| 1986 | 9 | 66 |