| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 70 | 93 |
| 2015 | 83 | 92 |
| 2014 | 123 | 84 |
| 2013 | 117 | 85 |
| 2012 | 113 | 85 |
| 2011 | 84 | 97 |
| 2010 | 64 | 100 |
| 2009 | 50 | 99 |
| 2008 | 65 | 96 |
| 2007 | 45 | 104 |
| 2006 | 40 | 101 |
| 2005 | 28 | 107 |
| 2004 | 21 | 112 |
| 2003 | 16 | 113 |
| 2002 | 13 | 111 |
| 2001 | 13 | 110 |
| 2000 | 12 | 112 |
| 1999 | 11 | 111 |
| 1998 | 11 | 107 |
| 1997 | 12 | 108 |
| 1996 | 11 | 108 |
| 1995 | 11 | 108 |
| 1994 | 10 | 105 |
| 1993 | 7 | 100 |
| 1992 | 7 | 100 |
| 1991 | 8 | 94 |
| 1990 | 9 | 95 |
| 1989 | 8 | 95 |
| 1988 | 6 | 98 |
| 1987 | 6 | 98 |
| 1986 | 6 | 92 |