| Value | Category | Cases | |
|---|---|---|---|
| 1 | purchased | 67 |
1.8%
|
| 2 | constructed | 2836 |
77.7%
|
| 3 | inherited | 737 |
20.2%
|
| 4 | other | 10 |
0.3%
|
| Sysmiss | [.a] invalid value | 0 | |
| Sysmiss | 3190 |