| Value | Category | Cases | |
|---|---|---|---|
| -2 | don't know | 0 |
0%
|
| -1 | refuse | 0 |
0%
|
| 1 | Did not exist before (start up) | 3 |
14.3%
|
| 2 | Had been operating before for less than one quarter | 0 |
0%
|
| 3 | Had been operating before for at least one quarter | 18 |
85.7%
|
| Sysmiss | 76 |