| 时间 |
值 （亿美元） |
世界排名 |
| 2016 |
288 |
20 |
| 2015 |
277 |
24 |
| 2014 |
313 |
21 |
| 2013 |
342 |
17 |
| 2012 |
309 |
19 |
| 2011 |
339 |
18 |
| 2010 |
334 |
15 |
| 2009 |
327 |
13 |
| 2008 |
374 |
13 |
| 2007 |
361 |
12 |
| 2006 |
298 |
12 |
| 2005 |
314 |
12 |
| 2004 |
329 |
10 |
| 2003 |
307 |
10 |
| 2002 |
244 |
12 |
| 2001 |
228 |
10 |
| 2000 |
223 |
11 |
| 1999 |
242 |
10 |
| 1998 |
256 |
9 |
| 1997 |
253 |
10 |
| 1996 |
282 |
10 |
| 1995 |
238 |
12 |