| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. not connected | 155 |
5.5%
|
| 2 | 2. too few plugs and lights | 322 |
11.5%
|
| 3 | 3. in between | 346 |
12.3%
|
| 4 | 4. ample plugs and lights | 1983 |
70.7%
|
| Sysmiss | 1732 |