| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, never sell | 26661 | 
                                    
                                    55.4%
                                 | 
| 2 | Sell excess from time to time | 20282 | 
                                    
                                    42.2%
                                 | 
| 3 | Yes, regularly | 1155 | 
                                    
                                    2.4%
                                 | 
| Sysmiss | 33680 |