Table 1. Sample statistics for the interviews.
| Absolute | Relative | |
|---|---|---|
| Gross sample 1 | 16000 | 100% = 16000 |
| Not used | 0 | 0.0% |
| Number not available | 5728 | 35.8% |
| Business number | 267 | 1.7% |
| Data tone | 181 | 1.1% |
| 6176 | 38.6% | |
| Gross sample 2 | 9824 | 100% = 9824 |
| Answering machine | 1296 | 13.2% |
| Constant ringing tone | 1290 | 13.1% |
| Not target group | 101 | 1.0% |
| Appointment not kept | 166 | 1.7% |
| Just hung up | 158 | 1.6% |
| 3011 | 30.6% | |
| Gross sample 3 | 6813 | 100% = 6813 |
| Interview declined | 4797 | 70.4% |
| Interrupted | 12 | 0.2% |
| Interview (direct) | 1882 | 27.6% |
| Interview (indirect) | 122 | 1.8% |
| Total interviews | 2004 | 29.4% |
From a total of 16,000 phone numbers, 6813 numbers were suitable for interviews and 2004 individuals (29.4%) completed an interview