| Value | Category | Cases | |
|---|---|---|---|
| 1 | AC | 50 |
83.3%
|
| 2 | DC | 4 |
6.7%
|
| 3 | Portable | 0 |
0%
|
| 888 | Don?t know | 6 |
10%
|
| Sysmiss | 221 |