| | | | | | | | | | | | | | | | Year | Reporting Status | Population | | 2003 | Reporting | 18,954 | | 2004 | Reporting | 19,062 | | 2005 | Reporting | 19,101 | | 2006 | Reporting | 19,284 | | 2007 | Reporting | 19,646 | | 2008 | Reporting | 19,779 | | 2009 | Reporting | 19,884 | | 2010 | Reporting | 20,118 | | 2011 | Reporting | 17,817 | | 2012 | Reporting | 17,782 |
| | | | | | | |
|