| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 1848.5 | 6 |
| 2015 | 1779.3 | 6 |
| 2014 | 1733.3 | 5 |
| 2013 | 1708.3 | 5 |
| 2012 | 1688.6 | 5 |
| 2011 | 1666.6 | 5 |
| 2010 | 1628.4 | 5 |
| 2009 | 1559.2 | 5 |
| 2008 | 1466.6 | 5 |
| 2007 | 1381.2 | 5 |
| 2006 | 1295.2 | 5 |
| 2005 | 1201.6 | 7 |
| 2004 | 1136.8 | 7 |
| 2003 | 1081.5 | 7 |
| 2002 | 1035.4 | 8 |
| 2001 | 982.5 | 8 |
| 2000 | 936.1 | 9 |
| 1999 | 896.5 | 10 |
| 1998 | 864.4 | 10 |
| 1997 | 837.9 | 9 |
| 1996 | 815 | 9 |
| 1995 | 793.9 | 9 |
| 1994 | 774.1 | 9 |
| 1993 | 755.2 | 9 |
| 1992 | 736.7 | 10 |
| 1991 | 738.8 | 10 |
| 1990 | 718.7 | 10 |
| 1989 | 697.2 | 10 |
| 1988 | 674.2 | 10 |
| 1987 | 650.7 | 10 |
| 1986 | 628.2 | 10 |