| Value | Category | Cases | |
|---|---|---|---|
| 0 | nr | 0 | 
                                    
                                    0%
                                 | 
| 1 | more than sufficient | 59 | 
                                    
                                    2.3%
                                 | 
| 2 | about adequate | 941 | 
                                    
                                    36.8%
                                 | 
| 3 | insufficient | 1507 | 
                                    
                                    58.9%
                                 | 
| 4 | don't know | 49 | 
                                    
                                    1.9%
                                 | 
| 6 | 1 | 
                                    
                                    0%
                                 | |
| 9 | na | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 443 |