| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 142.14 | 114 |
| 2015 | 142.62 | 117 |
| 2014 | 181.8 | 111 |
| 2013 | 175.91 | 114 |
| 2012 | 171.71 | 114 |
| 2011 | 181.86 | 113 |
| 2010 | 143.59 | 115 |
| 2009 | 120.65 | 117 |
| 2008 | 155.09 | 112 |
| 2007 | 124.39 | 114 |
| 2006 | 101.54 | 115 |
| 2005 | 94.59 | 112 |
| 2004 | 77.56 | 116 |
| 2003 | 64.97 | 115 |
| 2002 | 53.1 | 118 |
| 2001 | 50.19 | 118 |
| 2000 | 50.68 | 117 |
| 1999 | 46.63 | 117 |
| 1998 | 44.83 | 116 |
| 1997 | 53.27 | 107 |
| 1996 | 56.94 | 107 |
| 1995 | 49.59 | 106 |
| 1994 | 41.91 | 101 |
| 1993 | 43.79 | 102 |
| 1992 | 55.92 | 94 |
| 1991 | 54.03 | 94 |
| 1990 | 59.52 | 90 |
| 1989 | 41.86 | 92 |
| 1988 | 38.35 | 91 |
| 1987 | 32.82 | 93 |
| 1986 | 34.04 | 88 |