| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
21 |
85 |
| 2015 |
21 |
96 |
| 2014 |
20 |
103 |
| 2013 |
18 |
106 |
| 2012 |
19 |
104 |
| 2011 |
18 |
101 |
| 2010 |
15 |
104 |
| 2009 |
13 |
105 |
| 2008 |
14 |
105 |
| 2007 |
12 |
105 |
| 2006 |
11 |
105 |
| 2005 |
10 |
102 |
| 2004 |
9 |
105 |
| 2003 |
8 |
104 |
| 2002 |
9 |
100 |
| 2001 |
9 |
93 |
| 2000 |
9 |
92 |
| 1999 |
8 |
94 |
| 1998 |
9 |
94 |
| 1997 |
9 |
94 |
| 1996 |
9 |
92 |
| 1995 |
8 |
90 |
| 1994 |
7 |
82 |