| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 409.8 | 26 |
| 2015 | 397.2 | 26 |
| 2014 | 385.2 | 25 |
| 2013 | 373.8 | 26 |
| 2012 | 362.9 | 28 |
| 2011 | 352.2 | 29 |
| 2010 | 341.4 | 30 |
| 2009 | 330.6 | 31 |
| 2008 | 319.8 | 31 |
| 2007 | 309.2 | 32 |
| 2006 | 298.9 | 34 |
| 2005 | 289.1 | 39 |
| 2004 | 279.7 | 39 |
| 2003 | 270.8 | 40 |
| 2002 | 262.5 | 40 |
| 2001 | 255.3 | 41 |
| 2000 | 249.2 | 42 |
| 1999 | 244.5 | 41 |
| 1998 | 240.9 | 43 |
| 1997 | 238 | 42 |
| 1996 | 235.2 | 42 |
| 1995 | 232.2 | 43 |
| 1994 | 228.6 | 43 |
| 1993 | 224.7 | 42 |
| 1992 | 220.4 | 42 |
| 1991 | 215.8 | 42 |
| 1990 | 210.9 | 41 |
| 1989 | 205.6 | 40 |
| 1988 | 200 | 40 |
| 1987 | 194.2 | 40 |
| 1986 | 188.5 | 41 |