| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 24483789 | 3 |
| 2015 | 23740778 | 3 |
| 2014 | 22991068 | 3 |
| 2013 | 22199023 | 3 |
| 2012 | 21434264 | 3 |
| 2011 | 20693849 | 3 |
| 2010 | 19979977 | 4 |
| 2009 | 19290732 | 5 |
| 2008 | 18626163 | 5 |
| 2007 | 17982750 | 6 |
| 2006 | 17362403 | 6 |
| 2005 | 16763455 | 6 |
| 2004 | 16185952 | 6 |
| 2003 | 15626832 | 6 |
| 2002 | 15087756 | 6 |
| 2001 | 14567277 | 6 |
| 2000 | 13958981 | 6 |
| 1999 | 13172695 | 7 |
| 1998 | 12431692 | 7 |
| 1997 | 11732372 | 8 |
| 1996 | 11073273 | 8 |
| 1995 | 10449535 | 8 |
| 1994 | 9861717 | 9 |
| 1993 | 9306966 | 10 |
| 1992 | 8784122 | 11 |
| 1991 | 8289327 | 11 |
| 1990 | 7823028 | 14 |
| 1989 | 7616707 | 14 |
| 1988 | 7416734 | 14 |
| 1987 | 7221482 | 14 |
| 1986 | 7031628 | 14 |