| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 31 |
1.9%
|
| 1 | Never, it always has enough on hand | 612 |
37.3%
|
| 2 | Rarely | 503 |
30.7%
|
| 3 | Sometimes | 410 |
25%
|
| 4 | Frequently, at least once every three months | 84 |
5.1%
|