| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 85 | 75 |
| 2015 | 83 | 89 |
| 2014 | 91 | 92 |
| 2013 | 87 | 95 |
| 2012 | 79 | 95 |
| 2011 | 73 | 95 |
| 2010 | 59 | 96 |
| 2009 | 51 | 99 |
| 2008 | 50 | 103 |
| 2007 | 37 | 106 |
| 2006 | 32 | 105 |
| 2005 | 25 | 104 |
| 2004 | 24 | 102 |
| 2003 | 21 | 101 |
| 2002 | 20 | 99 |
| 2001 | 21 | 93 |
| 2000 | 22 | 92 |
| 1999 | 21 | 87 |
| 1998 | 22 | 83 |
| 1997 | 21 | 88 |
| 1996 | 21 | 84 |
| 1995 | 20 | 88 |
| 1994 | 17 | 76 |
| 1993 | 17 | 77 |
| 1992 | 17 | 74 |
| 1991 | 16 | 70 |
| 1990 | 16 | 71 |
| 1989 | 15 | 62 |
| 1988 | 14 | 59 |
| 1987 | 13 | 61 |
| 1986 | 13 | 60 |