| Value | Category | Cases | |
|---|---|---|---|
| 0 | nr | 0 | 
                                    
                                    0%
                                 | 
| 1 | more than sufficient | 78 | 
                                    
                                    2.6%
                                 | 
| 2 | about adequate | 1177 | 
                                    
                                    39.8%
                                 | 
| 3 | insufficient | 1669 | 
                                    
                                    56.5%
                                 | 
| 4 | don't know | 31 | 
                                    
                                    1%
                                 | 
| 5 | 1 | 
                                    
                                    0%
                                 | |
| 9 | na | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 44 |