| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 6.9 | 181 |
| 2015 | 6.7 | 181 |
| 2014 | 6.5 | 181 |
| 2013 | 6.3 | 181 |
| 2012 | 6.2 | 181 |
| 2011 | 6 | 182 |
| 2010 | 5.8 | 182 |
| 2009 | 5.7 | 182 |
| 2008 | 5.5 | 182 |
| 2007 | 5.3 | 183 |
| 2006 | 5.2 | 184 |
| 2005 | 5 | 185 |
| 2004 | 4.9 | 185 |
| 2003 | 4.7 | 185 |
| 2002 | 4.6 | 185 |
| 2001 | 4.5 | 185 |
| 2000 | 4.3 | 185 |
| 1999 | 4.2 | 185 |
| 1998 | 4.1 | 185 |
| 1997 | 4 | 185 |
| 1996 | 3.9 | 185 |
| 1995 | 3.8 | 185 |
| 1994 | 3.7 | 184 |
| 1993 | 3.6 | 184 |
| 1992 | 3.5 | 184 |
| 1991 | 3.4 | 185 |
| 1990 | 3.3 | 185 |