| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 16 | 185 |
| 2015 | 15.8 | 185 |
| 2014 | 15.6 | 185 |
| 2013 | 15.4 | 185 |
| 2012 | 15.2 | 185 |
| 2011 | 15.1 | 186 |
| 2010 | 14.9 | 186 |
| 2009 | 14.7 | 186 |
| 2008 | 14.6 | 186 |
| 2007 | 14.4 | 186 |
| 2006 | 14.1 | 186 |
| 2005 | 13.8 | 186 |
| 2004 | 13.4 | 186 |
| 2003 | 13.2 | 186 |
| 2002 | 12.9 | 186 |
| 2001 | 12.9 | 186 |
| 2000 | 13.4 | 186 |
| 1999 | 13.9 | 185 |
| 1998 | 14.4 | 185 |
| 1997 | 14.7 | 184 |
| 1996 | 14.6 | 184 |
| 1995 | 14.5 | 184 |
| 1994 | 14.5 | 182 |
| 1993 | 14.4 | 181 |
| 1992 | 14.4 | 181 |
| 1991 | 14.4 | 182 |
| 1990 | 14.5 | 182 |
| 1989 | 14.7 | 179 |
| 1988 | 14.9 | 179 |
| 1987 | 15.1 | 179 |
| 1986 | 15.3 | 179 |