| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 289.3 | 41 |
| 2015 | 266.8 | 47 |
| 2014 | 248 | 51 |
| 2013 | 240.2 | 52 |
| 2012 | 228.7 | 51 |
| 2011 | 198.1 | 53 |
| 2010 | 194 | 54 |
| 2009 | 186.6 | 52 |
| 2008 | 168.2 | 52 |
| 2007 | 167.7 | 52 |
| 2006 | 156.9 | 52 |
| 2005 | 141.9 | 51 |
| 2004 | 139 | 51 |
| 2003 | 136.3 | 51 |
| 2002 | 131.5 | 51 |
| 2001 | 137 | 50 |
| 2000 | 139.2 | 49 |
| 1999 | 140.5 | 47 |
| 1998 | 145.8 | 46 |
| 1997 | 148.7 | 46 |
| 1996 | 142.1 | 46 |
| 1995 | 136.5 | 46 |
| 1994 | 129.3 | 45 |
| 1993 | 121.9 | 45 |
| 1992 | 114.8 | 45 |
| 1991 | 115.8 | 46 |
| 1990 | 118.3 | 45 |
| 1989 | 110.8 | 39 |
| 1988 | 103.6 | 39 |
| 1987 | 95 | 40 |
| 1986 | 90.6 | 39 |