| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 21296830 | 4 |
| 2015 | 21066245 | 4 |
| 2014 | 20830857 | 5 |
| 2013 | 20531712 | 5 |
| 2012 | 20236863 | 5 |
| 2011 | 19946249 | 5 |
| 2010 | 19659808 | 5 |
| 2009 | 19377480 | 4 |
| 2008 | 19099587 | 4 |
| 2007 | 18824929 | 4 |
| 2006 | 18554591 | 4 |
| 2005 | 18288134 | 4 |
| 2004 | 18025864 | 5 |
| 2003 | 17766646 | 4 |
| 2002 | 17511506 | 4 |
| 2001 | 17260029 | 4 |
| 2000 | 17014078 | 4 |
| 1999 | 16787782 | 4 |
| 1998 | 16564802 | 4 |
| 1997 | 16344782 | 4 |
| 1996 | 16127983 | 4 |
| 1995 | 15913473 | 4 |
| 1994 | 15702105 | 4 |
| 1993 | 15493544 | 4 |
| 1992 | 15288036 | 4 |
| 1991 | 15068681 | 4 |
| 1990 | 14775840 | 4 |
| 1989 | 14488689 | 4 |
| 1988 | 14207502 | 4 |
| 1987 | 13931020 | 4 |
| 1986 | 13660287 | 4 |