| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 208.2 | 60 |
| 2015 | 203.7 | 61 |
| 2014 | 199.2 | 59 |
| 2013 | 194.8 | 60 |
| 2012 | 190.5 | 60 |
| 2011 | 186.3 | 59 |
| 2010 | 182.1 | 59 |
| 2009 | 177.9 | 60 |
| 2008 | 173.9 | 60 |
| 2007 | 169.9 | 60 |
| 2006 | 166 | 60 |
| 2005 | 162.1 | 60 |
| 2004 | 158.3 | 60 |
| 2003 | 154.6 | 60 |
| 2002 | 150.9 | 60 |
| 2001 | 147.5 | 60 |
| 2000 | 144.4 | 60 |
| 1999 | 141.5 | 58 |
| 1998 | 139 | 58 |
| 1997 | 136.6 | 58 |
| 1996 | 134.2 | 58 |
| 1995 | 131.7 | 60 |
| 1994 | 129.1 | 59 |
| 1993 | 126.5 | 60 |
| 1992 | 123.8 | 61 |
| 1991 | 121.1 | 63 |
| 1990 | 118.6 | 62 |
| 1989 | 116.3 | 63 |
| 1988 | 114 | 64 |
| 1987 | 111.9 | 63 |
| 1986 | 109.9 | 63 |