| Jahr* | Bestand
(in 1000) |
je 1000
Einwohner |
|---|---|---|
| 1960 | 413 | 87 |
| 1965 | 863 | 168 |
| 1970 | 1 336 | 248 |
| 1975 | 1 714 | 308 |
| 1980 | 2 226 | 398 |
| 1985 | 2 496 | 451 |
| 1990 | 2 969 | 515 |
| 1995 | 3 169 | 531 |
| 2000 | 3 351 | 555 |
| 2005 | 3 564 | 584 |
| 2006 | 3 609 | 592 |
| 2007 | 3 612 | 594 |
| 2008 | 3 247 | 535 |
| 2009 | 3 244 | 534 |
| 2010 | 3 279 | 541 |
| 2011 | 3 325 | 548 |