| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 | 
                                    
                                    0.4%
                                 | |
| 1 | Nouakchott | 185 | 
                                    
                                    66.8%
                                 | 
| 2 | South and Senegal River Region | 72 | 
                                    
                                    26%
                                 | 
| 3 | North Region | 14 | 
                                    
                                    5.1%
                                 | 
| 4 | West Region | 5 | 
                                    
                                    1.8%
                                 | 
| Sysmiss | 49 |