| Size of the municipality (no. of inhabitants) | Population | Sample | ||
| No. of municipalities | % | No. of municipalities | % | |
| Up to 4999 | 3102 | 72.5% | 709 | 43.6% |
| 5000 - 14,999 | 880 | 20.6% | 637 | 39.2% |
| 15,000 - 49,999 | 253 | 5.9% | 236 | 14.5% |
| 50,000 - 299,999 | 42 | 1.0% | 41 | 2.5% |
| Over 300,000 | 3 | 0.1% | 3 | 0.2% |
| Total | 4.280 | 100% | 1.626 | 100% |