| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 525.7 | 21 |
| 2015 | 523.3 | 21 |
| 2014 | 520.6 | 19 |
| 2013 | 517.4 | 18 |
| 2012 | 515.7 | 18 |
| 2011 | 513.6 | 18 |
| 2010 | 509.7 | 18 |
| 2009 | 507.8 | 18 |
| 2008 | 505.6 | 18 |
| 2007 | 502.3 | 17 |
| 2006 | 500 | 17 |
| 2005 | 497.5 | 17 |
| 2004 | 496.6 | 17 |
| 2003 | 494.8 | 17 |
| 2002 | 492.2 | 17 |
| 2001 | 489.7 | 17 |
| 2000 | 487.3 | 16 |
| 1999 | 483.3 | 16 |
| 1998 | 479.9 | 16 |
| 1997 | 476.4 | 14 |
| 1996 | 472 | 14 |
| 1995 | 467.5 | 14 |
| 1994 | 462.8 | 14 |
| 1993 | 458.2 | 14 |
| 1992 | 453.5 | 14 |
| 1991 | 448.8 | 14 |
| 1990 | 444.4 | 14 |
| 1989 | 440.1 | 14 |
| 1988 | 435.7 | 15 |
| 1987 | 431.5 | 14 |
| 1986 | 427.3 | 14 |