| Value | Category | Cases | |
|---|---|---|---|
| 1 | improved | 48 | 
                                    
                                    14.7%
                                 | 
| 2 | traditional | 244 | 
                                    
                                    74.8%
                                 | 
| 3 | IMPROVED, RECYCLED | 34 | 
                                    
                                    10.4%
                                 | 
| 4 | OTHER (SPECIFY) | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 851 |