| Value | Category | Cases | |
|---|---|---|---|
| 1 | AC | 50 |
35.7%
|
| 2 | DC | 35 |
25%
|
| 3 | Portable | 5 |
3.6%
|
| 888 | Don?t know | 50 |
35.7%
|
| Sysmiss | 141 |