| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 393.6 | 28 |
| 2015 | 388.6 | 28 |
| 2014 | 383.6 | 26 |
| 2013 | 378.5 | 25 |
| 2012 | 373.3 | 25 |
| 2011 | 368.1 | 25 |
| 2010 | 362.8 | 25 |
| 2009 | 357.5 | 25 |
| 2008 | 352.1 | 26 |
| 2007 | 346.8 | 26 |
| 2006 | 341.4 | 26 |
| 2005 | 336.1 | 26 |
| 2004 | 330.9 | 26 |
| 2003 | 325.7 | 26 |
| 2002 | 320.6 | 27 |
| 2001 | 315.4 | 27 |
| 2000 | 310.2 | 28 |
| 1999 | 304.9 | 28 |
| 1998 | 299.7 | 27 |
| 1997 | 294.3 | 27 |
| 1996 | 289 | 28 |
| 1995 | 283.7 | 28 |
| 1994 | 278.5 | 29 |
| 1993 | 273.2 | 30 |
| 1992 | 268 | 31 |
| 1991 | 262.8 | 31 |
| 1990 | 257.6 | 30 |
| 1989 | 252.4 | 29 |
| 1988 | 247.2 | 29 |
| 1987 | 242 | 30 |
| 1986 | 236.8 | 30 |