| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 198.8 | 96 |
| 2015 | 194.9 | 107 |
| 2014 | 228.3 | 107 |
| 2013 | 236.2 | 106 |
| 2012 | 253.8 | 99 |
| 2011 | 282.3 | 95 |
| 2010 | 274.2 | 92 |
| 2009 | 273.3 | 91 |
| 2008 | 313.9 | 87 |
| 2007 | 252.2 | 86 |
| 2006 | 210 | 87 |
| 2005 | 188 | 86 |
| 2004 | 174.4 | 83 |
| 2003 | 143.6 | 84 |
| 2002 | 114.8 | 85 |
| 2001 | 100.8 | 89 |
| 2000 | 99.4 | 87 |
| 1999 | 103.3 | 86 |
| 1998 | 101 | 86 |
| 1997 | 97.3 | 87 |
| 1996 | 99.4 | 82 |
| 1995 | 99.1 | 83 |
| 1994 | 74.6 | 82 |
| 1993 | 66.2 | 87 |
| 1992 | 76.9 | 81 |
| 1991 | 63.5 | 87 |
| 1990 | 59 | 88 |
| 1989 | 49.5 | 79 |
| 1988 | 45.1 | 79 |
| 1987 | 38.2 | 84 |
| 1986 | 32 | 86 |