| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 33 |
14.2%
|
| 1 | Never, it always has enough on hand | 77 |
33%
|
| 2 | Rarely | 85 |
36.5%
|
| 3 | Frequently, at least once every three months | 38 |
16.3%
|