| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 126.6 | 82 |
| 2015 | 125.6 | 82 |
| 2014 | 124.7 | 79 |
| 2013 | 123.8 | 81 |
| 2012 | 122.8 | 81 |
| 2011 | 121.7 | 81 |
| 2010 | 120.4 | 80 |
| 2009 | 118.8 | 80 |
| 2008 | 117.1 | 81 |
| 2007 | 115.1 | 81 |
| 2006 | 113.2 | 81 |
| 2005 | 111.2 | 83 |
| 2004 | 109.4 | 84 |
| 2003 | 107.5 | 84 |
| 2002 | 105.7 | 85 |
| 2001 | 103.9 | 86 |
| 2000 | 102.1 | 86 |
| 1999 | 100.2 | 84 |
| 1998 | 98.3 | 85 |
| 1997 | 96.4 | 85 |
| 1996 | 94.5 | 86 |
| 1995 | 92.6 | 86 |
| 1994 | 90.6 | 87 |
| 1993 | 88.6 | 88 |
| 1992 | 86.6 | 89 |
| 1991 | 84.8 | 91 |
| 1990 | 83 | 91 |
| 1989 | 81.3 | 89 |
| 1988 | 79.7 | 90 |
| 1987 | 78.3 | 91 |
| 1986 | 77.1 | 91 |