| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 23890270 | 14 |
| 2015 | 23159524 | 14 |
| 2014 | 22463974 | 14 |
| 2013 | 21798363 | 14 |
| 2012 | 21155445 | 14 |
| 2011 | 20534461 | 14 |
| 2010 | 19934684 | 14 |
| 2009 | 19355409 | 14 |
| 2008 | 18796715 | 14 |
| 2007 | 18255674 | 14 |
| 2006 | 17733924 | 14 |
| 2005 | 17230095 | 15 |
| 2004 | 16744257 | 15 |
| 2003 | 16273863 | 17 |
| 2002 | 15820339 | 17 |
| 2001 | 15382494 | 17 |
| 2000 | 14840726 | 17 |
| 1999 | 14227875 | 17 |
| 1998 | 13641777 | 17 |
| 1997 | 13080456 | 18 |
| 1996 | 12543574 | 19 |
| 1995 | 12027935 | 19 |
| 1994 | 11534741 | 20 |
| 1993 | 11062333 | 20 |
| 1992 | 10610430 | 22 |
| 1991 | 10176347 | 23 |
| 1990 | 9628934 | 23 |
| 1989 | 9057587 | 23 |
| 1988 | 8522390 | 23 |
| 1987 | 8018930 | 25 |
| 1986 | 7547229 | 25 |