| Value | Category |
|---|---|
| 10 | 1 generation |
| 21 | 2 adjacent generations, adult-children |
| 22 | 2 adjacent generations, adult-adult |
| 23 | 2 nonadjacent generations |
| 31 | 3+ generations (Census 2008 definition) |
| 32 | 3+ generations (Additional IPUMS definition) |
| 99 | NIU (not in universe) |