| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 191.9 | 68 |
| 2015 | 186.4 | 68 |
| 2014 | 181 | 65 |
| 2013 | 175.8 | 65 |
| 2012 | 170.7 | 66 |
| 2011 | 165.8 | 66 |
| 2010 | 160.9 | 65 |
| 2009 | 156.1 | 65 |
| 2008 | 151.4 | 64 |
| 2007 | 146.8 | 65 |
| 2006 | 142.4 | 65 |
| 2005 | 138.3 | 66 |
| 2004 | 134.5 | 67 |
| 2003 | 130.9 | 69 |
| 2002 | 127.4 | 69 |
| 2001 | 124.1 | 73 |
| 2000 | 120.7 | 72 |
| 1999 | 117.1 | 70 |
| 1998 | 113.5 | 73 |
| 1997 | 110.1 | 74 |
| 1996 | 107.2 | 76 |
| 1995 | 105.1 | 76 |
| 1994 | 103.9 | 75 |
| 1993 | 103.5 | 75 |
| 1992 | 103.2 | 75 |
| 1991 | 102.3 | 75 |
| 1990 | 100.1 | 75 |
| 1989 | 96.5 | 76 |
| 1988 | 91.6 | 78 |
| 1987 | 86.1 | 80 |
| 1986 | 80.9 | 85 |