In het postcodegebied 6431 is het aantal inwoners sinds 1998 als volgt opgebouwd :
| Jaar | Inwoners | Groei |
| 1998 | 11,645 | |
| 1999 | 11,540 | -0.90% |
| 2000 | 11,575 | 0.30% |
| 2001 | 11,645 | 0.60% |
| 2002 | 11,575 | -0.60% |
| 2003 | 11,515 | -0.52% |
| 2004 | 11,425 | -0.78% |
| 2005 | 11,270 | -1.36% |
| 2006 | 11,215 | -0.49% |
| 2007 | 11,030 | -1.65% |
| 2008 | 10,890 | -1.27% |
| 2009 | 10,865 | -0.23% |
| 2010 | 10,875 | 0.09% |
| 2011 | 10,805 | -0.64% |
| .2012 | 10,640 | -1.53% |
| 2013 | 10,615 | -0.23% |
| 2014 | 10,470 | -1.37% |
| 2015 | 10,260 | -2.01% |
| 2016 | 10,260 | 0.00% |
| 2017 | 10,200 | -0.58% |
| 2018 | 10,085 | -1.13% |
| 2019 | 10,055 | -0.30% |
| 2020 | 9,965 | -0.90% |