| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 361.8 | 88 |
| 2015 | 358 | 93 |
| 2014 | 435.24 | 89 |
| 2013 | 391.98 | 93 |
| 2012 | 351.64 | 93 |
| 2011 | 292.33 | 94 |
| 2010 | 225.83 | 100 |
| 2009 | 202.14 | 102 |
| 2008 | 192.72 | 104 |
| 2007 | 126.64 | 113 |
| 2006 | 102.78 | 114 |
| 2005 | 81.04 | 121 |
| 2004 | 68.38 | 120 |
| 2003 | 59.77 | 118 |
| 2002 | 44.62 | 123 |
| 2001 | 35.35 | 132 |
| 2000 | 29.05 | 139 |
| 1999 | 24.51 | 142 |
| 1998 | 26.06 | 140 |
| 1997 | 24.5 | 138 |
| 1996 | 23.79 | 141 |
| 1995 | 24.82 | 134 |
| 1994 | 25.61 | 124 |
| 1993 | 31.79 | 116 |
| 1992 | 32.01 | 113 |
| 1991 | 32.08 | 114 |
| 1990 | 31.9 | 111 |
| 1989 | 30.07 | 101 |
| 1988 | 30.11 | 99 |
| 1987 | 23.31 | 103 |