| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 756.1 | 13 |
| 2015 | 734.6 | 13 |
| 2014 | 713.4 | 12 |
| 2013 | 692.6 | 12 |
| 2012 | 672.2 | 12 |
| 2011 | 652.3 | 13 |
| 2010 | 633.1 | 13 |
| 2009 | 615 | 13 |
| 2008 | 597.5 | 14 |
| 2007 | 580.5 | 14 |
| 2006 | 565.8 | 14 |
| 2005 | 551.6 | 15 |
| 2004 | 537.6 | 15 |
| 2003 | 524.1 | 15 |
| 2002 | 510.9 | 15 |
| 2001 | 498 | 16 |
| 2000 | 485.4 | 17 |
| 1999 | 473.2 | 17 |
| 1998 | 461.2 | 18 |
| 1997 | 449.6 | 17 |
| 1996 | 429.9 | 18 |
| 1995 | 411.1 | 19 |
| 1994 | 393.1 | 19 |
| 1993 | 375.9 | 19 |
| 1992 | 359.4 | 19 |
| 1991 | 343.7 | 19 |
| 1990 | 328.6 | 20 |