| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 243.2 | 45 |
| 2015 | 235.3 | 52 |
| 2014 | 227.5 | 52 |
| 2013 | 220.7 | 54 |
| 2012 | 214.9 | 53 |
| 2011 | 207.5 | 52 |
| 2010 | 202.6 | 52 |
| 2009 | 196 | 51 |
| 2008 | 191.5 | 51 |
| 2007 | 187.7 | 51 |
| 2006 | 182 | 50 |
| 2005 | 180.4 | 48 |
| 2004 | 185.1 | 48 |
| 2003 | 182.6 | 48 |
| 2002 | 178.4 | 48 |
| 2001 | 173.4 | 48 |
| 2000 | 163.1 | 46 |
| 1999 | 159.2 | 45 |
| 1998 | 153.8 | 45 |
| 1997 | 152.1 | 45 |
| 1996 | 147.9 | 45 |
| 1995 | 142.1 | 45 |
| 1994 | 137.6 | 44 |
| 1993 | 132.3 | 44 |
| 1992 | 128.9 | 44 |
| 1991 | 113.6 | 47 |
| 1990 | 105.1 | 48 |
| 1989 | 99.8 | 40 |
| 1988 | 94.9 | 40 |
| 1987 | 91.2 | 41 |
| 1986 | 88.2 | 40 |