| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 366 |
3.4%
|
| 1 | Never, it always has enough on hand | 3294 |
30.9%
|
| 2 | Rarely | 4015 |
37.6%
|
| 3 | Sometimes | 2732 |
25.6%
|
| 4 | Frequently, at least once every three months | 265 |
2.5%
|