| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 294.8 | 40 |
| 2015 | 294.4 | 41 |
| 2014 | 293.9 | 38 |
| 2013 | 293.3 | 38 |
| 2012 | 292.6 | 38 |
| 2011 | 291.9 | 38 |
| 2010 | 291.3 | 38 |
| 2009 | 290.7 | 38 |
| 2008 | 290.1 | 38 |
| 2007 | 289.7 | 38 |
| 2006 | 289.3 | 39 |
| 2005 | 289.2 | 38 |
| 2004 | 289.3 | 37 |
| 2003 | 289.5 | 36 |
| 2002 | 289.8 | 36 |
| 2001 | 289.9 | 35 |
| 2000 | 289.8 | 34 |
| 1999 | 289.3 | 31 |
| 1998 | 288.5 | 30 |
| 1997 | 287.2 | 29 |
| 1996 | 285.6 | 29 |
| 1995 | 283.4 | 29 |
| 1994 | 281 | 28 |
| 1993 | 278 | 28 |
| 1992 | 274.3 | 29 |
| 1991 | 269.3 | 29 |