| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 8 | 
                                    
                                    4.2%
                                 | 
| 0 | 15 | 
                                    
                                    7.9%
                                 | |
| 1 | 18 | 
                                    
                                    9.4%
                                 | |
| 2 | 13 | 
                                    
                                    6.8%
                                 | |
| 3 | 15 | 
                                    
                                    7.9%
                                 | |
| 4 | 14 | 
                                    
                                    7.3%
                                 | |
| 5 | 17 | 
                                    
                                    8.9%
                                 | |
| 6 | 5 | 
                                    
                                    2.6%
                                 | |
| 7 | 9 | 
                                    
                                    4.7%
                                 | |
| 8 | 6 | 
                                    
                                    3.1%
                                 | |
| 9 | 2 | 
                                    
                                    1%
                                 | |
| 10 | 4 | 
                                    
                                    2.1%
                                 | |
| 11 | 2 | 
                                    
                                    1%
                                 | |
| 12 | 1 | 
                                    
                                    0.5%
                                 | |
| 13 | 3 | 
                                    
                                    1.6%
                                 | |
| 15 | 4 | 
                                    
                                    2.1%
                                 | |
| 16 | 1 | 
                                    
                                    0.5%
                                 | |
| 17 | 1 | 
                                    
                                    0.5%
                                 | |
| 18 | 1 | 
                                    
                                    0.5%
                                 | |
| 19 | 2 | 
                                    
                                    1%
                                 | |
| 20 | 4 | 
                                    
                                    2.1%
                                 | |
| 23 | 1 | 
                                    
                                    0.5%
                                 | |
| 24 | 1 | 
                                    
                                    0.5%
                                 | |
| 25 | 3 | 
                                    
                                    1.6%
                                 | |
| 30 | 2 | 
                                    
                                    1%
                                 | |
| 35 | 2 | 
                                    
                                    1%
                                 | |
| 37 | 1 | 
                                    
                                    0.5%
                                 | |
| 39 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 1 | 
                                    
                                    0.5%
                                 | |
| 44 | 1 | 
                                    
                                    0.5%
                                 | |
| 49 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 3 | 
                                    
                                    1.6%
                                 | |
| 53 | 1 | 
                                    
                                    0.5%
                                 | |
| 55 | 1 | 
                                    
                                    0.5%
                                 | |
| 60 | 1 | 
                                    
                                    0.5%
                                 | |
| 62 | 1 | 
                                    
                                    0.5%
                                 | |
| 66 | 1 | 
                                    
                                    0.5%
                                 | |
| 70 | 1 | 
                                    
                                    0.5%
                                 | |
| 80 | 2 | 
                                    
                                    1%
                                 | |
| 84 | 1 | 
                                    
                                    0.5%
                                 | |
| 85 | 2 | 
                                    
                                    1%
                                 | |
| 100 | 1 | 
                                    
                                    0.5%
                                 | |
| 117 | 1 | 
                                    
                                    0.5%
                                 | |
| 138 | 1 | 
                                    
                                    0.5%
                                 | |
| 150 | 3 | 
                                    
                                    1.6%
                                 | |
| 155 | 1 | 
                                    
                                    0.5%
                                 | |
| 175 | 1 | 
                                    
                                    0.5%
                                 | |
| 180 | 1 | 
                                    
                                    0.5%
                                 | |
| 200 | 3 | 
                                    
                                    1.6%
                                 | |
| 250 | 1 | 
                                    
                                    0.5%
                                 | |
| 268 | 1 | 
                                    
                                    0.5%
                                 | |
| 450 | 1 | 
                                    
                                    0.5%
                                 | |
| 800 | 1 | 
                                    
                                    0.5%
                                 | |
| 1050 | 1 | 
                                    
                                    0.5%
                                 | |
| 1800 | 1 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 154 |