| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 553.4 | 20 |
| 2015 | 549.3 | 20 |
| 2014 | 544.3 | 18 |
| 2013 | 538.4 | 17 |
| 2012 | 531.9 | 17 |
| 2011 | 525.1 | 17 |
| 2010 | 518.5 | 17 |
| 2009 | 512.1 | 17 |
| 2008 | 505.9 | 17 |
| 2007 | 499.6 | 18 |
| 2006 | 493.6 | 18 |
| 2005 | 487.3 | 18 |
| 2004 | 481.1 | 19 |
| 2003 | 474.9 | 19 |
| 2002 | 468.7 | 19 |
| 2001 | 462.7 | 19 |
| 2000 | 457 | 19 |
| 1999 | 451.6 | 19 |
| 1998 | 446.7 | 19 |
| 1997 | 441.8 | 18 |
| 1996 | 436.8 | 17 |
| 1995 | 431.3 | 17 |
| 1994 | 425.3 | 17 |
| 1993 | 419 | 16 |
| 1992 | 412.5 | 16 |
| 1991 | 406.4 | 16 |
| 1990 | 400.7 | 16 |
| 1989 | 395.7 | 16 |
| 1988 | 391.1 | 17 |
| 1987 | 386.8 | 17 |
| 1986 | 382.7 | 16 |