| 时间 |
值 （亿美元） |
世界排名 |
| 2014 |
19 |
105 |
| 2013 |
17 |
109 |
| 2012 |
15 |
109 |
| 2011 |
13 |
111 |
| 2010 |
10 |
116 |
| 2009 |
8 |
116 |
| 2008 |
8 |
118 |
| 2007 |
8 |
116 |
| 2006 |
8 |
108 |
| 2005 |
6 |
110 |
| 2004 |
5 |
106 |
| 2003 |
4 |
107 |
| 2002 |
4 |
108 |
| 2001 |
3 |
108 |
| 2000 |
3 |
110 |
| 1999 |
3 |
106 |
| 1998 |
2 |
110 |
| 1997 |
2 |
115 |
| 1996 |
2 |
110 |
| 1995 |
2 |
111 |
| 1994 |
1 |
111 |
| 1993 |
1 |
110 |
| 1992 |
1 |
114 |