| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 369.9 | 31 |
| 2015 | 366.7 | 31 |
| 2014 | 363.6 | 29 |
| 2013 | 360.6 | 29 |
| 2012 | 357.5 | 29 |
| 2011 | 354.3 | 28 |
| 2010 | 351 | 29 |
| 2009 | 348 | 28 |
| 2008 | 344.7 | 28 |
| 2007 | 341.4 | 28 |
| 2006 | 337.9 | 27 |
| 2005 | 334.2 | 27 |
| 2004 | 329.8 | 27 |
| 2003 | 325.6 | 27 |
| 2002 | 321.2 | 26 |
| 2001 | 317.1 | 26 |
| 2000 | 314 | 26 |
| 1999 | 311.5 | 24 |
| 1998 | 310.2 | 24 |
| 1997 | 309.2 | 24 |
| 1996 | 308.5 | 24 |
| 1995 | 307.7 | 24 |
| 1994 | 306.3 | 24 |
| 1993 | 305.2 | 23 |
| 1992 | 303.6 | 23 |
| 1991 | 301.8 | 22 |
| 1990 | 300.1 | 22 |
| 1989 | 298.2 | 21 |
| 1988 | 296.1 | 22 |
| 1987 | 294 | 22 |
| 1986 | 291.6 | 23 |