| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 250.6 | 49 |
| 2015 | 245.7 | 49 |
| 2014 | 240.7 | 47 |
| 2013 | 235.7 | 47 |
| 2012 | 230.8 | 47 |
| 2011 | 226 | 49 |
| 2010 | 221.3 | 49 |
| 2009 | 216.7 | 49 |
| 2008 | 212.3 | 49 |
| 2007 | 208 | 49 |
| 2006 | 203.8 | 50 |
| 2005 | 199.7 | 50 |
| 2004 | 195.6 | 52 |
| 2003 | 191.6 | 52 |
| 2002 | 187.6 | 51 |
| 2001 | 183.7 | 51 |
| 2000 | 179.7 | 52 |
| 1999 | 175.7 | 51 |
| 1998 | 171.6 | 52 |
| 1997 | 167.5 | 53 |
| 1996 | 163.4 | 53 |
| 1995 | 159.3 | 53 |
| 1994 | 155.4 | 53 |
| 1993 | 151.4 | 53 |
| 1992 | 147.6 | 53 |
| 1991 | 143.6 | 53 |
| 1990 | 139.7 | 52 |
| 1989 | 135.7 | 51 |
| 1988 | 131.6 | 52 |
| 1987 | 127.6 | 53 |
| 1986 | 123.6 | 54 |