In het postcodegebied 5991 is het aantal inwoners sinds 1998 als volgt opgebouwd :
| Jaar | Inwoners | Groei |
| 1998 | 6,595 | |
| 1999 | 6,550 | -0.68% |
| 2000 | 6,545 | -0.08% |
| 2001 | 6,550 | 0.08% |
| 2002 | 6,550 | 0.00% |
| 2003 | 6,545 | -0.08% |
| 2004 | 6,480 | -0.99% |
| 2005 | 6,440 | -0.62% |
| 2006 | 6,415 | -0.39% |
| 2007 | 6,455 | 0.62% |
| 2008 | 6,550 | 1.47% |
| 2009 | 6,600 | 0.76% |
| 2010 | 6,630 | 0.45% |
| 2011 | 6,635 | 0.08% |
| .2012 | 6,585 | -0.75% |
| 2013 | 6,590 | 0.08% |
| 2014 | 6,625 | 0.53% |
| 2015 | 6,545 | -1.21% |
| 2016 | 6,495 | -0.76% |
| 2017 | 6,540 | 0.69% |
| 2018 | 6,505 | -0.54% |
| 2019 | 6,505 | 0.00% |
| 2020 | 6,510 | 0.08% |