| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 20702391 | 17 |
| 2015 | 20352730 | 17 |
| 2014 | 19999485 | 17 |
| 2013 | 19454600 | 17 |
| 2012 | 18926571 | 17 |
| 2011 | 18414831 | 17 |
| 2010 | 17919502 | 18 |
| 2009 | 17439346 | 18 |
| 2008 | 16974487 | 19 |
| 2007 | 16522545 | 19 |
| 2006 | 16084937 | 19 |
| 2005 | 15660580 | 19 |
| 2004 | 15249591 | 19 |
| 2003 | 14849872 | 19 |
| 2002 | 14462689 | 19 |
| 2001 | 14065984 | 19 |
| 2000 | 13628695 | 20 |
| 1999 | 13205267 | 20 |
| 1998 | 12796928 | 20 |
| 1997 | 12402559 | 20 |
| 1996 | 12024582 | 21 |
| 1995 | 11665290 | 21 |
| 1994 | 11319580 | 21 |
| 1993 | 10986438 | 21 |
| 1992 | 10665799 | 21 |
| 1991 | 10355892 | 22 |
| 1990 | 10068525 | 22 |
| 1989 | 9795943 | 22 |
| 1988 | 9532817 | 22 |
| 1987 | 9277718 | 22 |
| 1986 | 9031375 | 22 |