| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 69.52 | 138 |
| 2015 | 78.53 | 142 |
| 2014 | 92.36 | 140 |
| 2013 | 85.07 | 143 |
| 2012 | 76.33 | 144 |
| 2011 | 65.23 | 147 |
| 2010 | 56.42 | 150 |
| 2009 | 49.79 | 151 |
| 2008 | 51.61 | 150 |
| 2007 | 37.19 | 160 |
| 2006 | 28.3 | 164 |
| 2005 | 23.12 | 162 |
| 2004 | 20.76 | 161 |
| 2003 | 15.54 | 164 |
| 2002 | 12.21 | 166 |
| 2001 | 10.81 | 164 |
| 2000 | 8.61 | 169 |
| 1999 | 10.87 | 161 |
| 1998 | 13.2 | 157 |
| 1997 | 9.22 | 164 |
| 1996 | 10.44 | 159 |
| 1995 | 12.32 | 157 |
| 1994 | 13.46 | 141 |
| 1993 | 16.47 | 138 |
| 1992 | 19.09 | 131 |
| 1991 | 25.35 | 127 |
| 1990 | 26.29 | 124 |