| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 38.8 | 153 |
| 2015 | 38.4 | 153 |
| 2014 | 38 | 153 |
| 2013 | 37.6 | 153 |
| 2012 | 37.2 | 153 |
| 2011 | 36.7 | 154 |
| 2010 | 36.1 | 154 |
| 2009 | 35.5 | 154 |
| 2008 | 34.8 | 154 |
| 2007 | 34.1 | 154 |
| 2006 | 33.3 | 154 |
| 2005 | 32.6 | 154 |
| 2004 | 31.9 | 154 |
| 2003 | 31.2 | 154 |
| 2002 | 30.6 | 154 |
| 2001 | 30 | 154 |
| 2000 | 29.6 | 154 |
| 1999 | 29.1 | 155 |
| 1998 | 28.7 | 155 |
| 1997 | 28.3 | 156 |
| 1996 | 27.8 | 157 |
| 1995 | 27.3 | 157 |
| 1994 | 26.9 | 158 |
| 1993 | 26.4 | 158 |
| 1992 | 25.9 | 158 |
| 1991 | 25.7 | 158 |
| 1990 | 25.5 | 158 |
| 1989 | 25.3 | 157 |
| 1988 | 25.1 | 157 |
| 1987 | 24.9 | 156 |
| 1986 | 24.9 | 157 |