| 时间 | 值 （万人） | 世界排名 |
|---|---|---|
| 2016 | 34.8 | 158 |
| 2015 | 34.6 | 158 |
| 2014 | 34.3 | 158 |
| 2013 | 34.2 | 158 |
| 2012 | 34 | 158 |
| 2011 | 33.7 | 159 |
| 2010 | 33.5 | 158 |
| 2009 | 33.1 | 158 |
| 2008 | 32.6 | 158 |
| 2007 | 32.1 | 158 |
| 2006 | 32.1 | 157 |
| 2005 | 32.1 | 156 |
| 2004 | 31.7 | 156 |
| 2003 | 31.4 | 156 |
| 2002 | 31.1 | 156 |
| 2001 | 30.7 | 156 |
| 2000 | 30.3 | 155 |
| 1999 | 30.2 | 154 |
| 1998 | 30 | 154 |
| 1997 | 29.8 | 154 |
| 1996 | 29.6 | 155 |
| 1995 | 29 | 155 |
| 1994 | 28.1 | 155 |
| 1993 | 27.3 | 155 |
| 1992 | 26.6 | 155 |
| 1991 | 25.9 | 156 |
| 1990 | 25.3 | 156 |