| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 504031 | 142 |
| 2015 | 502655 | 141 |
| 2014 | 501303 | 140 |
| 2013 | 498290 | 140 |
| 2012 | 495296 | 140 |
| 2011 | 492320 | 141 |
| 2010 | 489362 | 140 |
| 2009 | 486421 | 140 |
| 2008 | 483499 | 139 |
| 2007 | 480593 | 138 |
| 2006 | 477706 | 137 |
| 2005 | 474835 | 136 |
| 2004 | 471982 | 136 |
| 2003 | 469146 | 136 |
| 2002 | 466327 | 136 |
| 2001 | 463525 | 136 |
| 2000 | 460744 | 134 |
| 1999 | 457973 | 134 |
| 1998 | 455221 | 133 |
| 1997 | 452486 | 133 |
| 1996 | 449771 | 133 |
| 1995 | 447066 | 131 |
| 1994 | 444380 | 131 |
| 1993 | 445478 | 131 |
| 1992 | 446696 | 128 |
| 1991 | 447920 | 128 |
| 1990 | 445099 | 127 |
| 1989 | 440949 | 126 |
| 1988 | 436842 | 125 |
| 1987 | 432763 | 123 |
| 1986 | 428728 | 122 |