| Value | Category | Cases | |
|---|---|---|---|
| 1 | Natural material | 36 |
65.5%
|
| 2 | Simple material | 19 |
34.5%
|
| 3 | Sophisticated material | 0 |
0%
|
| 96 | Other | 0 |
0%
|
| Sysmiss | DK | 0 | |
| Sysmiss | RF | 0 | |
| Sysmiss | 1131 |