| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 143.33 | 113 |
| 2015 | 139.94 | 119 |
| 2014 | 165.09 | 118 |
| 2013 | 161.4 | 115 |
| 2012 | 158.46 | 116 |
| 2011 | 144.35 | 121 |
| 2010 | 116.39 | 124 |
| 2009 | 107.67 | 122 |
| 2008 | 127.95 | 120 |
| 2007 | 101.73 | 123 |
| 2006 | 77.45 | 126 |
| 2005 | 64.11 | 126 |
| 2004 | 51.25 | 132 |
| 2003 | 39.91 | 134 |
| 2002 | 33.96 | 135 |
| 2001 | 32.19 | 134 |
| 2000 | 30.57 | 136 |
| 1999 | 28 | 139 |
| 1998 | 36.14 | 128 |
| 1997 | 35.11 | 129 |
| 1996 | 30.95 | 132 |
| 1995 | 26.94 | 132 |
| 1994 | 25.14 | 125 |
| 1993 | 27.01 | 121 |
| 1992 | 36.9 | 105 |
| 1991 | 63.58 | 90 |
| 1990 | 77.54 | 82 |