| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
0.5%
|
| 1 | Never, it always has enough on hand | 265 |
24.2%
|
| 2 | Rarely | 527 |
48.1%
|
| 3 | Sometimes | 251 |
22.9%
|
| 4 | Frequently, at least once every three months | 48 |
4.4%
|