| Value | Category | Cases | |
|---|---|---|---|
| 1 | AC | 29 |
63%
|
| 2 | DC | 6 |
13%
|
| 3 | Portable | 8 |
17.4%
|
| 888 | Don?t know | 3 |
6.5%
|
| Sysmiss | 235 |