| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 111.6 | 123 |
| 2015 | 117.41 | 126 |
| 2014 | 122.27 | 133 |
| 2013 | 125.82 | 131 |
| 2012 | 122.93 | 130 |
| 2011 | 104.1 | 136 |
| 2010 | 71.89 | 141 |
| 2009 | 45.84 | 156 |
| 2008 | 56.23 | 146 |
| 2007 | 42.35 | 154 |
| 2006 | 34.14 | 154 |
| 2005 | 25.23 | 159 |
| 2004 | 19.92 | 163 |
| 2003 | 15.95 | 162 |
| 2002 | 13.97 | 161 |
| 2001 | 12.68 | 160 |
| 2000 | 11.37 | 160 |
| 1999 | 10.57 | 162 |
| 1998 | 11.24 | 161 |
| 1997 | 11.81 | 156 |
| 1996 | 13.46 | 156 |
| 1995 | 14.52 | 150 |
| 1994 | 9.26 | 151 |
| 1993 | 7.68 | 154 |
| 1992 | 13.18 | 143 |
| 1991 | 23.79 | 129 |
| 1990 | 25.61 | 125 |
| 1989 | 35.77 | 95 |
| 1988 | 32.04 | 98 |
| 1987 | 30.21 | 95 |
| 1986 | 28.96 | 92 |