Einwohnerzahlen (jeweils per 31. Dezember)
| Jahr (jeweils per 31. Dezember) | Einwohner |
| 2020 | 29'685 |
| 2019 | 29'076 |
| 2018 | 28'390 |
| 2017 | 27'800 |
| 2016 | 27'354 |
| 2015 | 26'587 |
| 2014 | 26'109 |
| 2013 | 25'529 |
| 2012 | 25'086 |
| 2011 | 24'817 |
| 2010 | 24'607 |
| 2000 | 21'971 |
| 1990 | 20'971 |
| 1980 | 20'830 |
| 1970 | 19'046 |
| 1960 | 11'784 |