make survev.io unpredictable
| Datum | Aantal installaties | Aantal bijwerkcontroles |
|---|---|---|
| 2026-05-10 | 4 | 1 |
| 2026-05-11 | 0 | 1 |
| 2026-05-12 | 0 | 1 |
| 2026-05-13 | 1 | 1 |
| 2026-05-14 | 0 | 0 |
| 2026-05-15 | 0 | 0 |
| 2026-05-16 | 1 | 0 |
| 2026-05-17 | 0 | 0 |
| 2026-05-18 | 0 | 0 |
| 2026-05-19 | 1 | 0 |
| 2026-05-20 | 0 | 0 |
| 2026-05-21 | 0 | 0 |
| 2026-05-22 | 0 | 0 |
