| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 134.8 | 80 |
| 2015 | 134.4 | 80 |
| 2014 | 133.9 | 75 |
| 2013 | 133.4 | 75 |
| 2012 | 132.8 | 74 |
| 2011 | 132.2 | 74 |
| 2010 | 131.6 | 74 |
| 2009 | 130.9 | 74 |
| 2008 | 130.3 | 73 |
| 2007 | 129.6 | 71 |
| 2006 | 128.8 | 71 |
| 2005 | 128.1 | 70 |
| 2004 | 127.2 | 71 |
| 2003 | 126.4 | 71 |
| 2002 | 125.4 | 72 |
| 2001 | 124.4 | 72 |
| 2000 | 123.2 | 70 |
| 1999 | 122 | 68 |
| 1998 | 120.6 | 68 |
| 1997 | 119.1 | 67 |
| 1996 | 117.7 | 67 |
| 1995 | 116.4 | 67 |
| 1994 | 115.3 | 69 |
| 1993 | 114.2 | 69 |
| 1992 | 113.2 | 69 |
| 1991 | 112.1 | 69 |
| 1990 | 110.8 | 67 |
| 1989 | 109.2 | 68 |
| 1988 | 107.5 | 67 |
| 1987 | 105.6 | 67 |
| 1986 | 103.7 | 67 |