| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 19267447 | 18 |
| 2015 | 19081407 | 18 |
| 2014 | 18893467 | 18 |
| 2013 | 18653745 | 18 |
| 2012 | 18417110 | 18 |
| 2011 | 18182881 | 18 |
| 2010 | 17951993 | 17 |
| 2009 | 17724080 | 17 |
| 2008 | 17499413 | 16 |
| 2007 | 17277029 | 16 |
| 2006 | 17057815 | 16 |
| 2005 | 16841425 | 16 |
| 2004 | 16628116 | 16 |
| 2003 | 16416974 | 15 |
| 2002 | 16208839 | 15 |
| 2001 | 15987570 | 16 |
| 2000 | 15745112 | 16 |
| 1999 | 15505886 | 15 |
| 1998 | 15270822 | 15 |
| 1997 | 15039525 | 14 |
| 1996 | 14812243 | 14 |
| 1995 | 14587984 | 14 |
| 1994 | 14367622 | 14 |
| 1993 | 14150782 | 14 |
| 1992 | 13937704 | 13 |
| 1991 | 13727452 | 13 |
| 1990 | 13556103 | 13 |
| 1989 | 13392173 | 13 |
| 1988 | 13230565 | 12 |
| 1987 | 13070588 | 12 |
| 1986 | 12912877 | 12 |