| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 175 | 74 |
| 2015 | 169 | 86 |
| 2014 | 208 | 78 |
| 2013 | 207 | 81 |
| 2012 | 195 | 82 |
| 2011 | 187 | 81 |
| 2010 | 134 | 85 |
| 2009 | 110 | 88 |
| 2008 | 171 | 82 |
| 2007 | 160 | 75 |
| 2006 | 125 | 81 |
| 2005 | 99 | 84 |
| 2004 | 84 | 82 |
| 2003 | 65 | 83 |
| 2002 | 48 | 87 |
| 2001 | 41 | 90 |
| 2000 | 37 | 91 |
| 1999 | 43 | 85 |
| 1998 | 47 | 80 |
| 1997 | 42 | 88 |
| 1996 | 34 | 93 |
| 1995 | 33 | 91 |
| 1994 | 33 | 80 |
| 1993 | 27 | 86 |