| Datum | Aantal gecertificeerde installateurs |
|---|---|
| string | number |
| nov/12 | 997 |
| dec/12 | 866 |
| jan/13 | 783 |
| feb/13 | 1096 |
| mrt/13 | 1158 |
| apr/13 | 1316 |
| mei/13 | 1426 |
| jun/13 | 1211 |
| jul/13 | 1765 |
| aug/13 | 830 |
| sep/13 | 1412 |
| okt/13 | 1678 |
| nov/13 | 1615 |
| dec/13 | 1274 |
| jan/14 | 1851 |
| feb/14 | 1668 |
| mrt/14 | 1759 |
| apr/14 | 1718 |
| mei/14 | 1317 |
| jun/14 | 1388 |