| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.1%
|
| 1 | Never, it always has enough on hand | 305 |
12%
|
| 2 | Rarely | 577 |
22.8%
|
| 3 | Sometimes | 1083 |
42.7%
|
| 4 | Frequently, at least once every three months | 567 |
22.4%
|