| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 149.9 | 71 |
| 2015 | 149.2 | 71 |
| 2014 | 148.6 | 68 |
| 2013 | 148.1 | 67 |
| 2012 | 147.9 | 67 |
| 2011 | 147.8 | 67 |
| 2010 | 148 | 67 |
| 2009 | 148.5 | 66 |
| 2008 | 149.3 | 65 |
| 2007 | 150.1 | 64 |
| 2006 | 151 | 62 |
| 2005 | 151.7 | 62 |
| 2004 | 152.3 | 61 |
| 2003 | 152.6 | 61 |
| 2002 | 152.8 | 59 |
| 2001 | 153.1 | 59 |
| 2000 | 153.5 | 59 |
| 1999 | 154 | 57 |
| 1998 | 154.6 | 57 |
| 1997 | 155 | 55 |
| 1996 | 154.8 | 54 |
| 1995 | 153.7 | 54 |
| 1994 | 151.5 | 54 |
| 1993 | 148.5 | 54 |
| 1992 | 144.9 | 54 |
| 1991 | 141.1 | 54 |