| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2015 | 175 | 40 |
| 2014 | 164 | 45 |
| 2013 | 179 | 41 |
| 2012 | 176 | 42 |
| 2011 | 171 | 42 |
| 2010 | 143 | 42 |
| 2009 | 117 | 46 |
| 2008 | 129 | 46 |
| 2007 | 104 | 47 |
| 2006 | 81 | 47 |
| 2005 | 72 | 47 |
| 2004 | 63 | 41 |
| 2003 | 54 | 44 |
| 2002 | 47 | 44 |
| 2001 | 82 | 30 |
| 2000 | 89 | 30 |
| 1999 | 86 | 30 |
| 1998 | 90 | 29 |
| 1997 | 87 | 28 |
| 1996 | 76 | 29 |
| 1995 | 70 | 28 |
| 1994 | 69 | 27 |
| 1993 | 61 | 26 |
| 1992 | 53 | 27 |
| 1991 | 38 | 28 |
| 1990 | 29 | 30 |
| 1989 | 25 | 31 |
| 1988 | 25 | 29 |
| 1987 | 24 | 26 |
| 1986 | 23 | 26 |