| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 12.3 | 175 |
| 2015 | 11.9 | 175 |
| 2014 | 11.6 | 175 |
| 2013 | 11.3 | 177 |
| 2012 | 11 | 177 |
| 2011 | 10.7 | 178 |
| 2010 | 10.4 | 178 |
| 2009 | 10.1 | 178 |
| 2008 | 9.9 | 178 |
| 2007 | 9.7 | 178 |
| 2006 | 9.5 | 178 |
| 2005 | 9.3 | 178 |
| 2004 | 9.1 | 178 |
| 2003 | 8.9 | 178 |
| 2002 | 8.7 | 178 |
| 2001 | 8.5 | 178 |
| 2000 | 8.3 | 178 |
| 1999 | 8.2 | 178 |
| 1998 | 8.1 | 178 |
| 1997 | 8 | 176 |
| 1996 | 7.9 | 176 |
| 1995 | 7.8 | 176 |
| 1994 | 7.6 | 175 |
| 1993 | 7.4 | 175 |
| 1992 | 7.2 | 175 |
| 1991 | 7.1 | 176 |
| 1990 | 6.9 | 176 |