| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
26 |
76 |
| 2015 |
27 |
85 |
| 2014 |
34 |
79 |
| 2013 |
29 |
87 |
| 2012 |
24 |
95 |
| 2011 |
31 |
82 |
| 2010 |
21 |
93 |
| 2009 |
13 |
106 |
| 2008 |
23 |
89 |
| 2007 |
28 |
76 |
| 2006 |
21 |
78 |
| 2005 |
22 |
75 |
| 2004 |
30 |
63 |
| 2003 |
24 |
64 |
| 2002 |
22 |
63 |
| 2001 |
22 |
64 |
| 2000 |
25 |
61 |
| 1999 |
25 |
62 |
| 1998 |
31 |
57 |
| 1997 |
32 |
59 |
| 1996 |
37 |
52 |
| 1995 |
40 |
46 |