| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 131 |
3.5%
|
| 1 | Never, it always has enough on hand | 681 |
18%
|
| 2 | Rarely | 1075 |
28.5%
|
| 3 | Sometimes | 1622 |
43%
|
| 4 | Frequently, at least once every three months | 266 |
7%
|