| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
0.5%
|
| 1 | Never, it always has enough on hand | 303 |
30.4%
|
| 2 | Rarely | 503 |
50.4%
|
| 3 | Sometimes | 187 |
18.7%
|
| 4 | Frequently, at least once every three months | 0 |
0%
|