| Value | Category | Cases | |
|---|---|---|---|
| 1 | AC | 6 |
25%
|
| 2 | DC | 3 |
12.5%
|
| 3 | Portable | 9 |
37.5%
|
| 888 | Don?t know | 6 |
25%
|
| Sysmiss | 257 |