| 时间 | 值 （人/平方公里） | 世界排名 |
|---|---|---|
| 2016 | 136.8 | 78 |
| 2015 | 136.6 | 77 |
| 2014 | 136.3 | 74 |
| 2013 | 136.1 | 73 |
| 2012 | 136.1 | 73 |
| 2011 | 135.9 | 72 |
| 2010 | 135.6 | 72 |
| 2009 | 135.2 | 71 |
| 2008 | 134.4 | 70 |
| 2007 | 133.3 | 70 |
| 2006 | 132.5 | 70 |
| 2005 | 132.2 | 69 |
| 2004 | 132 | 69 |
| 2003 | 131.9 | 67 |
| 2002 | 132 | 65 |
| 2001 | 132.2 | 64 |
| 2000 | 132.7 | 64 |
| 1999 | 133.1 | 61 |
| 1998 | 133.2 | 61 |
| 1997 | 133.4 | 60 |
| 1996 | 133.5 | 60 |
| 1995 | 133.7 | 57 |
| 1994 | 133.7 | 56 |
| 1993 | 133.7 | 56 |
| 1992 | 133.5 | 56 |
| 1991 | 133.4 | 56 |
| 1990 | 133.7 | 53 |
| 1989 | 134.1 | 52 |
| 1988 | 134 | 51 |
| 1987 | 133.9 | 51 |
| 1986 | 133.8 | 51 |