| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
0.7%
|
| 1 | Never, it always has enough on hand | 431 |
30.6%
|
| 2 | Rarely | 539 |
38.2%
|
| 3 | Sometimes | 336 |
23.8%
|
| 4 | Frequently, at least once every three months | 94 |
6.7%
|