| Value | Category |
|---|---|
| 1 | I read about it in a newspaper (online or printed) |
| 2 | I received an email from an organisation or online network |
| 3 | Somebody told me about it or sent me the link |
| 4 | Through social media (Facebook, Twitter or etc.) |
| 5 | I saw an advertisement (banner) online, please specify where |
| 6 | Somewhere else |
| Sysmiss |