| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 22 | 
                                    
                                    11.4%
                                 | |
| 1 | 16 | 
                                    
                                    8.3%
                                 | |
| 2 | 23 | 
                                    
                                    11.9%
                                 | |
| 3 | 12 | 
                                    
                                    6.2%
                                 | |
| 4 | 18 | 
                                    
                                    9.3%
                                 | |
| 5 | 9 | 
                                    
                                    4.7%
                                 | |
| 6 | 12 | 
                                    
                                    6.2%
                                 | |
| 7 | 5 | 
                                    
                                    2.6%
                                 | |
| 8 | 6 | 
                                    
                                    3.1%
                                 | |
| 9 | 2 | 
                                    
                                    1%
                                 | |
| 10 | 7 | 
                                    
                                    3.6%
                                 | |
| 12 | 1 | 
                                    
                                    0.5%
                                 | |
| 13 | 4 | 
                                    
                                    2.1%
                                 | |
| 14 | 2 | 
                                    
                                    1%
                                 | |
| 15 | 4 | 
                                    
                                    2.1%
                                 | |
| 17 | 1 | 
                                    
                                    0.5%
                                 | |
| 18 | 4 | 
                                    
                                    2.1%
                                 | |
| 20 | 2 | 
                                    
                                    1%
                                 | |
| 21 | 2 | 
                                    
                                    1%
                                 | |
| 24 | 1 | 
                                    
                                    0.5%
                                 | |
| 25 | 3 | 
                                    
                                    1.6%
                                 | |
| 27 | 3 | 
                                    
                                    1.6%
                                 | |
| 30 | 3 | 
                                    
                                    1.6%
                                 | |
| 31 | 1 | 
                                    
                                    0.5%
                                 | |
| 32 | 1 | 
                                    
                                    0.5%
                                 | |
| 35 | 5 | 
                                    
                                    2.6%
                                 | |
| 36 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 3 | 
                                    
                                    1.6%
                                 | |
| 46 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 1 | 
                                    
                                    0.5%
                                 | |
| 54 | 1 | 
                                    
                                    0.5%
                                 | |
| 55 | 1 | 
                                    
                                    0.5%
                                 | |
| 65 | 1 | 
                                    
                                    0.5%
                                 | |
| 75 | 1 | 
                                    
                                    0.5%
                                 | |
| 77 | 1 | 
                                    
                                    0.5%
                                 | |
| 80 | 4 | 
                                    
                                    2.1%
                                 | |
| 90 | 1 | 
                                    
                                    0.5%
                                 | |
| 95 | 1 | 
                                    
                                    0.5%
                                 | |
| 120 | 1 | 
                                    
                                    0.5%
                                 | |
| 140 | 1 | 
                                    
                                    0.5%
                                 | |
| 154 | 1 | 
                                    
                                    0.5%
                                 | |
| 158 | 1 | 
                                    
                                    0.5%
                                 | |
| 220 | 1 | 
                                    
                                    0.5%
                                 | |
| 480 | 1 | 
                                    
                                    0.5%
                                 | |
| 530 | 1 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 49 |