| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
21 |
123 |
| 2015 |
22 |
126 |
| 2014 |
29 |
124 |
| 2013 |
29 |
123 |
| 2012 |
24 |
129 |
| 2011 |
22 |
133 |
| 2010 |
17 |
132 |
| 2009 |
11 |
138 |
| 2008 |
15 |
137 |
| 2007 |
12 |
140 |
| 2006 |
9 |
141 |
| 2005 |
9 |
136 |
| 2004 |
6 |
144 |
| 2003 |
5 |
148 |
| 2002 |
3 |
149 |
| 2001 |
3 |
149 |
| 2000 |
3 |
150 |
| 1999 |
2 |
158 |
| 1998 |
2 |
159 |
| 1997 |
2 |
150 |
| 1996 |
2 |
156 |
| 1995 |
2 |
161 |
| 1994 |
2 |
152 |