| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 10.1 | 193 |
| 2015 | 10 | 193 |
| 2014 | 9.9 | 193 |
| 2013 | 9.8 | 193 |
| 2012 | 9.7 | 193 |
| 2011 | 9.6 | 194 |
| 2010 | 9.5 | 194 |
| 2009 | 9.4 | 194 |
| 2008 | 9.2 | 194 |
| 2007 | 9.1 | 194 |
| 2006 | 9 | 194 |
| 2005 | 8.9 | 194 |
| 2004 | 8.8 | 194 |
| 2003 | 8.7 | 194 |
| 2002 | 8.6 | 194 |
| 2001 | 8.5 | 194 |
| 2000 | 8.4 | 194 |
| 1999 | 8.2 | 194 |
| 1998 | 8 | 194 |
| 1997 | 7.8 | 194 |
| 1996 | 7.6 | 195 |
| 1995 | 7.4 | 195 |
| 1994 | 7.2 | 194 |
| 1993 | 7 | 195 |
| 1992 | 6.8 | 195 |
| 1991 | 6.7 | 196 |
| 1990 | 6.7 | 196 |
| 1989 | 6.7 | 194 |
| 1988 | 6.7 | 193 |
| 1987 | 6.8 | 192 |
| 1986 | 6.9 | 191 |