| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 427.5 | 25 |
| 2015 | 417.7 | 25 |
| 2014 | 408.1 | 23 |
| 2013 | 398.4 | 24 |
| 2012 | 389 | 24 |
| 2011 | 379.7 | 24 |
| 2010 | 370.6 | 24 |
| 2009 | 361.8 | 24 |
| 2008 | 353.2 | 25 |
| 2007 | 344.8 | 27 |
| 2006 | 336.6 | 28 |
| 2005 | 328.7 | 28 |
| 2004 | 320.9 | 28 |
| 2003 | 313.4 | 28 |
| 2002 | 306 | 29 |
| 2001 | 298.7 | 31 |
| 2000 | 291.4 | 32 |
| 1999 | 284.2 | 33 |
| 1998 | 276.9 | 35 |
| 1997 | 269.7 | 34 |
| 1996 | 262.6 | 35 |
| 1995 | 255.5 | 35 |
| 1994 | 248.4 | 35 |
| 1993 | 241.4 | 37 |
| 1992 | 234.5 | 38 |
| 1991 | 227.8 | 40 |
| 1990 | 221.2 | 39 |
| 1989 | 214.7 | 38 |
| 1988 | 208.5 | 38 |
| 1987 | 202.4 | 38 |
| 1986 | 196.5 | 39 |