In het postcodegebied 6121 is het aantal inwoners sinds 1998 als volgt opgebouwd :
| Jaar | Inwoners | Groei |
| 1998 | 5,560 | |
| 1999 | 5,525 | -0.63% |
| 2000 | 5,500 | -0.45% |
| 2001 | 5,525 | 0.45% |
| 2002 | 5,710 | 3.35% |
| 2003 | 5,835 | 2.19% |
| 2004 | 5,885 | 0.86% |
| 2005 | 5,915 | 0.51% |
| 2006 | 6,000 | 1.44% |
| 2007 | 6,015 | 0.25% |
| 2008 | 6,030 | 0.25% |
| 2009 | 6,090 | 1.00% |
| 2010 | 6,070 | -0.33% |
| 2011 | 6,080 | 0.16% |
| .2012 | 6,070 | -0.16% |
| 2013 | 5,995 | -1.24% |
| 2014 | 6,000 | 0.08% |
| 2015 | 6,055 | 0.92% |
| 2016 | 6,055 | 0.00% |
| 2017 | 6,045 | -0.17% |
| 2018 | 6,025 | -0.33% |
| 2019 | 6,005 | -0.33% |
| 2020 | 5,975 | -0.50% |