| | | | | | | | | | | | | | | | Year | Reporting Status | Population | | 2003 | Reporting | 18,063 | | 2004 | Reporting | 17,860 | | 2005 | Reporting | 19,062 | | 2006 | Reporting | 19,026 | | 2007 | Reporting | 19,069 | | 2008 | Reporting | 19,975 | | 2009 | Reporting | 20,192 | | 2010 | Reporting | 20,148 | | 2011 | Reporting | 19,125 | | 2012 | Reporting | 19,244 |
| | | | | | | |
|