| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 8.1 | 173 |
| 2015 | 8.1 | 172 |
| 2014 | 8.1 | 172 |
| 2013 | 8.1 | 172 |
| 2012 | 8.2 | 172 |
| 2011 | 8.2 | 173 |
| 2010 | 8.2 | 173 |
| 2009 | 8.2 | 173 |
| 2008 | 8.2 | 173 |
| 2007 | 8.3 | 173 |
| 2006 | 8.3 | 173 |
| 2005 | 8.3 | 173 |
| 2004 | 8.4 | 173 |
| 2003 | 8.3 | 173 |
| 2002 | 8.3 | 174 |
| 2001 | 8.2 | 173 |
| 2000 | 8.1 | 173 |
| 1999 | 8.1 | 173 |
| 1998 | 8 | 173 |
| 1997 | 7.9 | 173 |
| 1996 | 7.9 | 173 |
| 1995 | 7.7 | 173 |
| 1994 | 7.6 | 173 |
| 1993 | 7.4 | 173 |
| 1992 | 7.2 | 175 |
| 1991 | 7.1 | 175 |
| 1990 | 6.9 | 175 |
| 1989 | 6.8 | 173 |
| 1988 | 6.7 | 174 |
| 1987 | 6.6 | 175 |
| 1986 | 6.5 | 175 |