| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| 1 | Never, it always has enough on hand | 239 |
66.2%
|
| 2 | Rarely | 77 |
21.3%
|
| 3 | Frequently, at least once every three months | 32 |
8.9%
|
| 4 | 12 |
3.3%
|