| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | Never, it always has enough on hand | 51 |
42.5%
|
| 2 | Rarely | 44 |
36.7%
|
| 3 | Frequently, at least once every three months | 24 |
20%
|