| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 46.3 | 151 |
| 2015 | 46.3 | 152 |
| 2014 | 46.2 | 147 |
| 2013 | 46.2 | 146 |
| 2012 | 46.1 | 145 |
| 2011 | 46.1 | 143 |
| 2010 | 46.1 | 142 |
| 2009 | 46 | 142 |
| 2008 | 45.9 | 142 |
| 2007 | 45.8 | 141 |
| 2006 | 45.7 | 139 |
| 2005 | 45.7 | 138 |
| 2004 | 45.6 | 138 |
| 2003 | 45.5 | 137 |
| 2002 | 45.3 | 136 |
| 2001 | 45.2 | 135 |
| 2000 | 45 | 134 |
| 1999 | 45.1 | 132 |
| 1998 | 45.2 | 132 |
| 1997 | 45.3 | 130 |
| 1996 | 45.4 | 129 |
| 1995 | 45.5 | 128 |
| 1994 | 45.5 | 125 |
| 1993 | 45.4 | 124 |
| 1992 | 45.2 | 123 |
| 1991 | 45.1 | 123 |
| 1990 | 45.1 | 118 |
| 1989 | 45.1 | 116 |
| 1988 | 45.2 | 116 |
| 1987 | 45.2 | 113 |
| 1986 | 45.2 | 112 |