| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 7.6 | 180 |
| 2015 | 7.5 | 180 |
| 2014 | 7.4 | 180 |
| 2013 | 7.4 | 180 |
| 2012 | 7.3 | 180 |
| 2011 | 7.3 | 181 |
| 2010 | 7.2 | 181 |
| 2009 | 7.1 | 181 |
| 2008 | 7.1 | 181 |
| 2007 | 7 | 181 |
| 2006 | 7.2 | 181 |
| 2005 | 7 | 181 |
| 2004 | 7 | 181 |
| 2003 | 6.9 | 181 |
| 2002 | 6.9 | 181 |
| 2001 | 7 | 181 |
| 2000 | 7 | 181 |
| 1999 | 6.9 | 181 |
| 1998 | 6.9 | 181 |
| 1997 | 6.8 | 180 |
| 1996 | 6.7 | 180 |
| 1995 | 6.6 | 180 |
| 1994 | 6.5 | 179 |
| 1993 | 6.4 | 179 |
| 1992 | 6.3 | 178 |
| 1991 | 6.1 | 179 |
| 1990 | 6 | 179 |