| Value | Category |
|---|---|
| 1 | Continuing member since Round 4 |
| 2 | Died since Round 4 |
| 3 | Left household since Round 4 |
| 4 | Returned to household since Round 4 |
| 5 | Died or left before Round 4 |
| 6 | New member through birth |
| 7 | New member through marriage |
| 8 | New member through other entry |