| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 272.8 | 43 |
| 2015 | 273 | 46 |
| 2014 | 274.1 | 47 |
| 2013 | 269.8 | 46 |
| 2012 | 276.4 | 46 |
| 2011 | 266.7 | 47 |
| 2010 | 274 | 45 |
| 2009 | 266.8 | 45 |
| 2008 | 273.3 | 43 |
| 2007 | 270.4 | 41 |
| 2006 | 263 | 40 |
| 2005 | 256.1 | 41 |
| 2004 | 248.9 | 41 |
| 2003 | 244.5 | 41 |
| 2002 | 228.7 | 41 |
| 2001 | 245.1 | 40 |
| 2000 | 222 | 41 |
| 1999 | 219.8 | 40 |
| 1998 | 238.7 | 39 |
| 1997 | 247.3 | 39 |
| 1996 | 253.2 | 36 |
| 1995 | 267.6 | 34 |
| 1994 | 290.6 | 33 |
| 1993 | 330.8 | 30 |
| 1992 | 330.4 | 30 |
| 1991 | 318.2 | 31 |
| 1990 | 296.2 | 31 |