| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 185.7 | 99 |
| 2015 | 178.7 | 111 |
| 2014 | 177.5 | 112 |
| 2013 | 172.1 | 115 |
| 2012 | 157.1 | 118 |
| 2011 | 143.9 | 119 |
| 2010 | 128.1 | 115 |
| 2009 | 110.8 | 120 |
| 2008 | 101.5 | 125 |
| 2007 | 87.2 | 127 |
| 2006 | 78.6 | 121 |
| 2005 | 76.8 | 118 |
| 2004 | 68.7 | 117 |
| 2003 | 59.7 | 116 |
| 2002 | 53.1 | 115 |
| 2001 | 60.8 | 110 |
| 2000 | 63.2 | 106 |
| 1999 | 68.8 | 97 |
| 1998 | 62.2 | 102 |
| 1997 | 58.6 | 102 |
| 1996 | 53.6 | 102 |
| 1995 | 51.6 | 102 |
| 1994 | 44.7 | 98 |