| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 37.9 | 157 |
| 2015 | 37.4 | 157 |
| 2014 | 36.7 | 157 |
| 2013 | 35.9 | 157 |
| 2012 | 35 | 157 |
| 2011 | 34.3 | 158 |
| 2010 | 33.3 | 159 |
| 2009 | 32.2 | 159 |
| 2008 | 31.3 | 159 |
| 2007 | 30 | 159 |
| 2006 | 28.1 | 160 |
| 2005 | 26.5 | 160 |
| 2004 | 25 | 161 |
| 2003 | 23.5 | 162 |
| 2002 | 23 | 162 |
| 2001 | 22.7 | 162 |
| 2000 | 21.5 | 162 |
| 1999 | 21 | 162 |
| 1998 | 20.6 | 161 |
| 1997 | 20.2 | 161 |
| 1996 | 19.9 | 161 |
| 1995 | 17.2 | 162 |
| 1994 | 16.3 | 163 |
| 1993 | 16 | 163 |
| 1992 | 15.7 | 163 |
| 1991 | 15.1 | 165 |
| 1990 | 14.7 | 165 |