Bevolkingsopbouw, in duizendtallen, 1960- 2010
| 1960 | 1970 | 1980 | 1990 | 2000 | 2010 | |
| 0 - 14 | 3.424 | 3.549 | 3.184 | 2.710 | 2.906 | 2.754 |
| 15 - 24 | 1.707 | 2.275 | 2.439 | 2.367 | 1.839 | 1.974 |
| 25 - 64 | 5.268 | 5.823 | 6.853 | 7.905 | 8.803 | 8.969 |
| 65+ | 1.018 | 1.311 | 1.615 | 1.911 | 2.169 | 2.448 |
| totaal | 11.417 | 12.958 | 14.091 | 14.893 | 15.717 | 16.145 |