| Value | Category | Cases | |
|---|---|---|---|
| 1 | improved | 191 | 
                                    
                                    12.2%
                                 | 
| 2 | traditional | 1234 | 
                                    
                                    79%
                                 | 
| 3 | IMPROVED, RECYCLED | 136 | 
                                    
                                    8.7%
                                 | 
| 4 | OTHER (SPECIFY) | 1 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 452 |