| Value | Category |
|---|---|
| 0 | NR |
| 1 | received from government agency : free of cost |
| 2 | received from government agency : on payment |
| 3 | received from private agency : free of cost |
| 4 | received from private agency : on payment |
| 5 | received from agency not known : free of cost |
| 6 | received from agency not known : on payment |
| 7 | not received (from public or private agency) |
| 9 | Invalid |