| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 68.9 | 130 |
| 2015 | 68.5 | 130 |
| 2014 | 67.9 | 127 |
| 2013 | 67.4 | 127 |
| 2012 | 66.9 | 129 |
| 2011 | 66.3 | 129 |
| 2010 | 65.8 | 129 |
| 2009 | 65.3 | 127 |
| 2008 | 64.9 | 127 |
| 2007 | 64.4 | 126 |
| 2006 | 64 | 124 |
| 2005 | 63.6 | 123 |
| 2004 | 63.2 | 122 |
| 2003 | 62.8 | 121 |
| 2002 | 62.4 | 119 |
| 2001 | 62 | 119 |
| 2000 | 61.7 | 117 |
| 1999 | 61.4 | 114 |
| 1998 | 61.1 | 112 |
| 1997 | 60.8 | 110 |
| 1996 | 60.5 | 108 |
| 1995 | 60.1 | 108 |
| 1994 | 59.6 | 106 |
| 1993 | 59.1 | 106 |
| 1992 | 58.5 | 106 |
| 1991 | 58 | 107 |
| 1990 | 57.5 | 105 |
| 1989 | 57.2 | 102 |
| 1988 | 57 | 102 |
| 1987 | 56.9 | 100 |
| 1986 | 56.7 | 100 |