| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
26 |
59 |
| 2015 |
25 |
90 |
| 2014 |
28 |
87 |
| 2013 |
28 |
87 |
| 2012 |
27 |
86 |
| 2011 |
28 |
85 |
| 2010 |
23 |
89 |
| 2009 |
24 |
79 |
| 2008 |
33 |
74 |
| 2007 |
28 |
75 |
| 2006 |
20 |
80 |
| 2005 |
16 |
80 |
| 2004 |
12 |
80 |
| 2003 |
9 |
83 |
| 2002 |
6 |
91 |
| 2001 |
6 |
92 |
| 2000 |
6 |
90 |
| 1999 |
6 |
86 |
| 1998 |
7 |
81 |
| 1997 |
6 |
84 |
| 1996 |
7 |
78 |
| 1995 |
2 |
105 |
| 1994 |
2 |
99 |
| 1993 |
2 |
99 |
| 1992 |
1 |
105 |