| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 155 | 78 |
| 2015 | 175 | 85 |
| 2014 | 175 | 86 |
| 2013 | 157 | 89 |
| 2012 | 142 | 93 |
| 2011 | 120 | 98 |
| 2010 | 92 | 102 |
| 2009 | 76 | 101 |
| 2008 | 99 | 100 |
| 2007 | 95 | 95 |
| 2006 | 75 | 100 |
| 2005 | 63 | 99 |
| 2004 | 58 | 96 |
| 2003 | 48 | 94 |
| 2002 | 44 | 93 |
| 2001 | 40 | 93 |
| 2000 | 40 | 89 |
| 1999 | 37 | 89 |
| 1998 | 34 | 94 |
| 1997 | 36 | 95 |
| 1996 | 35 | 92 |
| 1995 | 36 | 86 |
| 1994 | 36 | 77 |
| 1993 | 33 | 79 |
| 1992 | 32 | 79 |
| 1991 | 29 | 78 |
| 1990 | 25 | 84 |
| 1989 | 23 | 70 |
| 1988 | 20 | 71 |
| 1987 | 18 | 74 |
| 1986 | 15 | 74 |