| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 26 |
4.2%
|
| 1 | Never, it always has enough on hand | 203 |
33.2%
|
| 2 | Rarely | 197 |
32.2%
|
| 3 | Sometimes | 144 |
23.5%
|
| 4 | Frequently, at least once every three months | 42 |
6.9%
|