| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 384.6 | 29 |
| 2015 | 391.6 | 27 |
| 2014 | 398.5 | 24 |
| 2013 | 405.1 | 23 |
| 2012 | 409.8 | 23 |
| 2011 | 414.7 | 23 |
| 2010 | 419.6 | 21 |
| 2009 | 421.7 | 20 |
| 2008 | 424 | 20 |
| 2007 | 426.5 | 20 |
| 2006 | 429 | 20 |
| 2005 | 430.8 | 20 |
| 2004 | 431.4 | 20 |
| 2003 | 431.4 | 20 |
| 2002 | 431.1 | 20 |
| 2001 | 430.5 | 20 |
| 2000 | 429.6 | 20 |
| 1999 | 428.4 | 20 |
| 1998 | 426.3 | 20 |
| 1997 | 423.8 | 19 |
| 1996 | 419.9 | 19 |
| 1995 | 415.2 | 18 |
| 1994 | 411.4 | 18 |
| 1993 | 407.6 | 17 |
| 1992 | 404.2 | 17 |
| 1991 | 401.6 | 17 |
| 1990 | 398.8 | 17 |
| 1989 | 395.2 | 17 |
| 1988 | 391.6 | 16 |
| 1987 | 388 | 16 |
| 1986 | 384.4 | 15 |