| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 195.51 | 106 |
| 2015 | 211.54 | 105 |
| 2014 | 271.51 | 101 |
| 2013 | 280.45 | 102 |
| 2012 | 255.03 | 102 |
| 2011 | 234.6 | 105 |
| 2010 | 202.66 | 104 |
| 2009 | 153.28 | 109 |
| 2008 | 179.11 | 108 |
| 2007 | 140.57 | 108 |
| 2006 | 127.57 | 108 |
| 2005 | 83.32 | 117 |
| 2004 | 62.21 | 124 |
| 2003 | 49.02 | 128 |
| 2002 | 41.94 | 127 |
| 2001 | 40.94 | 124 |
| 2000 | 36.01 | 130 |
| 1999 | 34.04 | 133 |
| 1998 | 35.38 | 131 |
| 1997 | 43.03 | 117 |
| 1996 | 35.97 | 124 |
| 1995 | 38.07 | 120 |
| 1994 | 36.57 | 109 |
| 1993 | 32.73 | 112 |
| 1992 | 31.82 | 114 |
| 1991 | 33.79 | 110 |
| 1990 | 32.85 | 108 |
| 1989 | 39.99 | 93 |
| 1988 | 37.14 | 93 |
| 1987 | 22.7 | 106 |
| 1986 | 16.62 | 109 |