| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
21 |
131 |
| 2015 |
22 |
154 |
| 2014 |
22 |
159 |
| 2013 |
19 |
162 |
| 2012 |
15 |
165 |
| 2011 |
15 |
164 |
| 2010 |
12 |
162 |
| 2009 |
11 |
162 |
| 2008 |
12 |
162 |
| 2007 |
17 |
151 |
| 2006 |
12 |
155 |
| 2005 |
12 |
153 |
| 2004 |
11 |
154 |
| 2003 |
1 |
180 |
| 2002 |
2 |
176 |
| 2001 |
2 |
172 |
| 2000 |
2 |
169 |
| 1999 |
2 |
169 |
| 1998 |
1 |
172 |
| 1997 |
2 |
165 |
| 1986 |
4 |
110 |