| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 179.8 | 14 |
| 2015 | 167.6 | 14 |
| 2014 | 181.1 | 15 |
| 2013 | 168.7 | 18 |
| 2012 | 147.4 | 19 |
| 2011 | 153.7 | 18 |
| 2010 | 145.6 | 18 |
| 2009 | 139.8 | 17 |
| 2008 | 141 | 17 |
| 2007 | 119.9 | 17 |
| 2006 | 114.4 | 17 |
| 2005 | 108.2 | 17 |
| 2004 | 110.2 | 15 |
| 2003 | 107.2 | 13 |
| 2002 | 100 | 13 |
| 2001 | 95.3 | 14 |
| 2000 | 93.7 | 14 |
| 1999 | 86.1 | 14 |
| 1998 | 91 | 13 |
| 1997 | 96.4 | 14 |
| 1996 | 95.2 | 14 |
| 1995 | 88.6 | 15 |
| 1994 | 86.7 | 15 |
| 1993 | 87.4 | 13 |
| 1992 | 82 | 13 |
| 1991 | 104.6 | 13 |
| 1990 | 72.3 | 16 |
| 1989 | 60.6 | 16 |
| 1988 | 75 | 12 |
| 1987 | 60 | 14 |
| 1986 | 43.9 | 14 |