| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 43.9 | 155 |
| 2015 | 42.6 | 155 |
| 2014 | 41.3 | 155 |
| 2013 | 40 | 155 |
| 2012 | 38.7 | 155 |
| 2011 | 37.5 | 156 |
| 2010 | 36.3 | 156 |
| 2009 | 35.2 | 156 |
| 2008 | 34 | 156 |
| 2007 | 33 | 157 |
| 2006 | 32.1 | 156 |
| 2005 | 31.4 | 157 |
| 2004 | 30.8 | 157 |
| 2003 | 30.4 | 157 |
| 2002 | 29.9 | 157 |
| 2001 | 29.5 | 157 |
| 2000 | 28.9 | 158 |
| 1999 | 28.1 | 158 |
| 1998 | 27.3 | 158 |
| 1997 | 26.5 | 158 |
| 1996 | 25.7 | 158 |
| 1995 | 25 | 158 |
| 1994 | 24.3 | 158 |
| 1993 | 23.7 | 158 |
| 1992 | 23.1 | 157 |
| 1991 | 22.5 | 158 |
| 1990 | 21.8 | 158 |