| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
15 |
132 |
| 2015 |
15 |
137 |
| 2014 |
19 |
139 |
| 2013 |
21 |
134 |
| 2012 |
19 |
137 |
| 2011 |
20 |
135 |
| 2010 |
18 |
130 |
| 2009 |
17 |
127 |
| 2008 |
19 |
129 |
| 2007 |
13 |
137 |
| 2006 |
9 |
142 |
| 2005 |
7 |
142 |
| 2004 |
7 |
139 |
| 2003 |
6 |
141 |
| 2002 |
5 |
139 |
| 2001 |
5 |
137 |
| 2000 |
5 |
135 |
| 1999 |
5 |
141 |
| 1998 |
5 |
130 |
| 1997 |
6 |
126 |
| 1996 |
5 |
132 |
| 1995 |
4 |
138 |
| 1994 |
3 |
138 |