| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 5.6 | 182 |
| 2015 | 5.6 | 182 |
| 2014 | 5.6 | 182 |
| 2013 | 5.7 | 182 |
| 2012 | 5.7 | 182 |
| 2011 | 5.8 | 182 |
| 2010 | 5.8 | 180 |
| 2009 | 5.9 | 180 |
| 2008 | 6 | 180 |
| 2007 | 6 | 179 |
| 2006 | 6.1 | 179 |
| 2005 | 6.2 | 179 |
| 2004 | 6.3 | 178 |
| 2003 | 6.4 | 178 |
| 2002 | 6.6 | 176 |
| 2001 | 6.7 | 176 |
| 2000 | 6.9 | 176 |
| 1999 | 7.1 | 176 |
| 1998 | 7.3 | 175 |
| 1997 | 7.2 | 175 |
| 1996 | 7.1 | 175 |
| 1995 | 7 | 175 |
| 1994 | 7.1 | 175 |
| 1993 | 7.2 | 175 |
| 1992 | 7.2 | 174 |
| 1991 | 7.3 | 174 |
| 1990 | 7.3 | 173 |
| 1989 | 7.2 | 171 |
| 1988 | 7.2 | 172 |
| 1987 | 7.1 | 172 |
| 1986 | 7.1 | 172 |