| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | Never, it always has enough on hand | 43 |
35.8%
|
| 2 | Rarely | 47 |
39.2%
|
| 3 | Frequently, at least once every three months | 29 |
24.2%
|