In het postcodegebied 1013 is het aantal inwoners sinds 1998 als volgt opgebouwd :
| Jaar | Inwoners | Groei |
| 1998 | 18,630 | |
| 1999 | 18,660 | 0.16% |
| 2000 | 18,605 | -0.29% |
| 2001 | 18,745 | 0.75% |
| 2002 | 18,650 | -0.51% |
| 2003 | 18,570 | -0.43% |
| 2004 | 18,560 | -0.05% |
| 2005 | 18,755 | 1.05% |
| 2006 | 19,195 | 2.35% |
| 2007 | 18,900 | -1.54% |
| 2008 | 19,040 | 0.74% |
| 2009 | 19,720 | 3.57% |
| 2010 | 20,450 | 3.70% |
| 2011 | 21,180 | 3.57% |
| .2012 | 21,555 | 1.77% |
| 2013 | 21,570 | 0.07% |
| 2014 | 21,560 | -0.05% |
| 2015 | 21,635 | 0.35% |
| 2016 | 21,180 | -2.10% |
| 2017 | 21,080 | -0.47% |
| 2018 | 21,135 | 0.26% |
| 2019 | 21,335 | 0.95% |
| 2020 | 21,395 | 0.28% |