| Value | Category | Cases | |
|---|---|---|---|
| 1 | AC | 12 |
70.6%
|
| 2 | DC | 4 |
23.5%
|
| 3 | Portable | 0 |
0%
|
| 888 | Don?t know | 1 |
5.9%
|
| Sysmiss | 264 |