| Value | Category |
|---|---|
| 1 | 1. I was taught by someone I used to help |
| 2 | 2. Learned on the job, similar kind of bus. |
| 3 | 3. Learned on the job, different kind of bus. |
| 4 | 4. I was taught by a friend |
| 5 | 5. I was taught by a family member |
| 6 | 6. I taught myself |
| 7 | 7. I underwent formal training (describe) |
| 8 | 8. No need for training |
| 10 | 10. Other (describe) |