| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 6996.9 | 4 |
| 2015 | 6957.8 | 4 |
| 2014 | 6896.9 | 4 |
| 2013 | 6845.2 | 4 |
| 2012 | 6813.9 | 4 |
| 2011 | 6734.9 | 4 |
| 2010 | 6689.7 | 4 |
| 2009 | 6640.8 | 4 |
| 2008 | 6626.5 | 4 |
| 2007 | 6587 | 4 |
| 2006 | 6530.6 | 3 |
| 2005 | 6488.8 | 3 |
| 2004 | 6460.5 | 3 |
| 2003 | 6410.3 | 3 |
| 2002 | 6423 | 3 |
| 2001 | 6394.6 | 3 |
| 2000 | 6347.6 | 3 |
| 1999 | 6291.9 | 3 |
| 1998 | 6232.1 | 3 |
| 1997 | 6180.3 | 3 |
| 1996 | 6129 | 3 |
| 1995 | 5863 | 3 |
| 1994 | 6096.4 | 3 |
| 1993 | 5960.6 | 3 |
| 1992 | 5859.1 | 3 |
| 1991 | 5810.1 | 3 |
| 1990 | 5762.1 | 3 |
| 1989 | 5743.6 | 3 |
| 1988 | 5684.4 | 3 |
| 1987 | 5636.9 | 3 |
| 1986 | 5580.4 | 3 |