| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 239 | 32 |
| 2015 | 228 | 37 |
| 2014 | 250 | 36 |
| 2013 | 239 | 35 |
| 2012 | 242 | 35 |
| 2011 | 249 | 35 |
| 2010 | 219 | 36 |
| 2009 | 206 | 35 |
| 2008 | 237 | 35 |
| 2007 | 189 | 35 |
| 2006 | 155 | 36 |
| 2005 | 128 | 35 |
| 2004 | 127 | 32 |
| 2003 | 114 | 30 |
| 2002 | 102 | 30 |
| 2001 | 100 | 28 |
| 2000 | 97 | 30 |
| 1999 | 96 | 28 |
| 1998 | 90 | 28 |
| 1997 | 80 | 29 |
| 1996 | 87 | 27 |
| 1995 | 81 | 27 |
| 1994 | 64 | 28 |
| 1993 | 55 | 25 |