| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 107.2 | 112 |
| 2015 | 116.2 | 129 |
| 2014 | 128.2 | 131 |
| 2013 | 154.2 | 119 |
| 2012 | 150.5 | 120 |
| 2011 | 126.9 | 126 |
| 2010 | 79.1 | 139 |
| 2009 | 49.2 | 148 |
| 2008 | 63.6 | 143 |
| 2007 | 41.8 | 150 |
| 2006 | 32.1 | 152 |
| 2005 | 26.5 | 154 |
| 2004 | 21.9 | 157 |
| 2003 | 18.4 | 155 |
| 2002 | 16.3 | 152 |
| 2001 | 14.6 | 150 |
| 2000 | 12.9 | 150 |
| 1999 | 11.8 | 151 |
| 1998 | 12.6 | 151 |
| 1997 | 11.2 | 151 |
| 1996 | 14.4 | 148 |
| 1995 | 14.7 | 146 |
| 1994 | 10.2 | 145 |
| 1993 | 8.5 | 141 |
| 1992 | 14.2 | 136 |
| 1991 | 30.6 | 113 |
| 1990 | 31.3 | 109 |
| 1989 | 47 | 84 |
| 1988 | 44.1 | 81 |
| 1987 | 42.7 | 80 |
| 1986 | 43.8 | 78 |