| | | | | | | | | | | | | | | | Year | Reporting Status | Population | | 2003 | Reporting | 18,326 | | 2004 | Reporting | 18,746 | | 2005 | Reporting | 19,226 | | 2006 | Reporting | 20,053 | | 2007 | Reporting | 20,553 | | 2008 | Reporting | 21,091 | | 2009 | Reporting | 21,259 | | 2010 | Reporting | 21,490 | | 2011 | Reporting | 21,961 | | 2012 | Reporting | 21,886 |
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