| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 124 | 83 |
| 2015 | 119 | 98 |
| 2014 | 140 | 95 |
| 2013 | 137 | 96 |
| 2012 | 138 | 94 |
| 2011 | 153 | 88 |
| 2010 | 147 | 82 |
| 2009 | 140 | 79 |
| 2008 | 175 | 81 |
| 2007 | 140 | 83 |
| 2006 | 115 | 86 |
| 2005 | 105 | 81 |
| 2004 | 99 | 75 |
| 2003 | 82 | 74 |
| 2002 | 71 | 71 |
| 2001 | 67 | 72 |
| 2000 | 69 | 68 |
| 1999 | 68 | 66 |
| 1998 | 69 | 70 |
| 1997 | 68 | 69 |
| 1996 | 70 | 67 |
| 1995 | 66 | 66 |
| 1994 | 36 | 78 |
| 1993 | 32 | 80 |
| 1992 | 42 | 71 |
| 1991 | 33 | 76 |
| 1990 | 32 | 75 |
| 1989 | 27 | 65 |
| 1988 | 23 | 68 |
| 1987 | 19 | 73 |
| 1986 | 15 | 73 |