| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 ppm (no iodine) | 2825 | 
                                    
                                    19.3%
                                 | 
| 14 | < 15 ppm | 2546 | 
                                    
                                    17.4%
                                 | 
| 15 | 15+ ppm | 7535 | 
                                    
                                    51.4%
                                 | 
| 994 | salt not tested | 0 | 
                                    
                                    0%
                                 | 
| 995 | no salt | 1208 | 
                                    
                                    8.2%
                                 | 
| 996 | 0 | 
                                    
                                    0%
                                 | |
| 997 | not dejure resident | 543 | 
                                    
                                    3.7%
                                 | 
| 998 | 0 | 
                                    
                                    0%
                                 | |
| Sysmiss | 289 |