| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 144.1 | 74 |
| 2015 | 142.5 | 74 |
| 2014 | 140.8 | 72 |
| 2013 | 139.1 | 72 |
| 2012 | 137.4 | 72 |
| 2011 | 135.6 | 73 |
| 2010 | 133.9 | 73 |
| 2009 | 132.1 | 73 |
| 2008 | 130.4 | 72 |
| 2007 | 128.6 | 73 |
| 2006 | 126.9 | 73 |
| 2005 | 125.1 | 74 |
| 2004 | 123.4 | 75 |
| 2003 | 121.7 | 74 |
| 2002 | 120.1 | 75 |
| 2001 | 118.4 | 74 |
| 2000 | 116.8 | 74 |
| 1999 | 115.2 | 72 |
| 1998 | 113.6 | 72 |
| 1997 | 112 | 70 |
| 1996 | 110.4 | 72 |
| 1995 | 108.7 | 74 |
| 1994 | 107.1 | 74 |
| 1993 | 105.4 | 74 |
| 1992 | 103.6 | 74 |
| 1991 | 101.9 | 76 |
| 1990 | 100.2 | 74 |
| 1989 | 98.4 | 74 |
| 1988 | 96.6 | 74 |
| 1987 | 94.8 | 75 |
| 1986 | 93 | 75 |