| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
11 |
102 |
| 2015 |
10 |
116 |
| 2014 |
11 |
116 |
| 2013 |
12 |
114 |
| 2012 |
11 |
116 |
| 2011 |
13 |
109 |
| 2010 |
12 |
107 |
| 2009 |
12 |
107 |
| 2008 |
14 |
107 |
| 2007 |
12 |
107 |
| 2006 |
10 |
109 |
| 2005 |
9 |
109 |
| 2004 |
9 |
106 |
| 2003 |
6 |
116 |
| 2002 |
6 |
117 |
| 2001 |
5 |
115 |
| 2000 |
5 |
114 |
| 1999 |
6 |
106 |
| 1998 |
7 |
108 |
| 1997 |
6 |
109 |
| 1996 |
6 |
108 |
| 1995 |
4 |
123 |
| 1994 |
5 |
95 |