| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                    
                                    1%
                                 | 
| 1 | Never, it always has enough on hand | 24 | 
                                    
                                    24.7%
                                 | 
| 2 | Rarely | 35 | 
                                    
                                    36.1%
                                 | 
| 3 | Sometimes | 31 | 
                                    
                                    32%
                                 | 
| 4 | Frequently, at least once every three months | 6 | 
                                    
                                    6.2%
                                 |