| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 65 | 
                                    
                                    33.7%
                                 | 
| 1 | 2 | 
                                    
                                    1%
                                 | |
| 2 | 1 | 
                                    
                                    0.5%
                                 | |
| 3 | 1 | 
                                    
                                    0.5%
                                 | |
| 5 | 2 | 
                                    
                                    1%
                                 | |
| 10 | 1 | 
                                    
                                    0.5%
                                 | |
| 15 | 2 | 
                                    
                                    1%
                                 | |
| 20 | 4 | 
                                    
                                    2.1%
                                 | |
| 25 | 1 | 
                                    
                                    0.5%
                                 | |
| 30 | 1 | 
                                    
                                    0.5%
                                 | |
| 31 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 2 | 
                                    
                                    1%
                                 | |
| 70 | 1 | 
                                    
                                    0.5%
                                 | |
| 75 | 1 | 
                                    
                                    0.5%
                                 | |
| 90 | 1 | 
                                    
                                    0.5%
                                 | |
| 100 | 5 | 
                                    
                                    2.6%
                                 | |
| 110 | 1 | 
                                    
                                    0.5%
                                 | |
| 120 | 2 | 
                                    
                                    1%
                                 | |
| 130 | 3 | 
                                    
                                    1.6%
                                 | |
| 145 | 1 | 
                                    
                                    0.5%
                                 | |
| 150 | 8 | 
                                    
                                    4.1%
                                 | |
| 170 | 1 | 
                                    
                                    0.5%
                                 | |
| 175 | 2 | 
                                    
                                    1%
                                 | |
| 180 | 2 | 
                                    
                                    1%
                                 | |
| 200 | 8 | 
                                    
                                    4.1%
                                 | |
| 210 | 1 | 
                                    
                                    0.5%
                                 | |
| 220 | 2 | 
                                    
                                    1%
                                 | |
| 230 | 1 | 
                                    
                                    0.5%
                                 | |
| 250 | 7 | 
                                    
                                    3.6%
                                 | |
| 260 | 1 | 
                                    
                                    0.5%
                                 | |
| 280 | 1 | 
                                    
                                    0.5%
                                 | |
| 300 | 4 | 
                                    
                                    2.1%
                                 | |
| 400 | 5 | 
                                    
                                    2.6%
                                 | |
| 430 | 1 | 
                                    
                                    0.5%
                                 | |
| 450 | 2 | 
                                    
                                    1%
                                 | |
| 500 | 5 | 
                                    
                                    2.6%
                                 | |
| 600 | 3 | 
                                    
                                    1.6%
                                 | |
| 650 | 2 | 
                                    
                                    1%
                                 | |
| 700 | 1 | 
                                    
                                    0.5%
                                 | |
| 720 | 1 | 
                                    
                                    0.5%
                                 | |
| 750 | 2 | 
                                    
                                    1%
                                 | |
| 800 | 2 | 
                                    
                                    1%
                                 | |
| 850 | 1 | 
                                    
                                    0.5%
                                 | |
| 980 | 1 | 
                                    
                                    0.5%
                                 | |
| 1000 | 11 | 
                                    
                                    5.7%
                                 | |
| 1200 | 2 | 
                                    
                                    1%
                                 | |
| 1250 | 2 | 
                                    
                                    1%
                                 | |
| 1400 | 1 | 
                                    
                                    0.5%
                                 | |
| 1500 | 2 | 
                                    
                                    1%
                                 | |
| 2000 | 2 | 
                                    
                                    1%
                                 | |
| 3000 | 4 | 
                                    
                                    2.1%
                                 | |
| 4500 | 1 | 
                                    
                                    0.5%
                                 | |
| 6000 | 1 | 
                                    
                                    0.5%
                                 | |
| 7500 | 2 | 
                                    
                                    1%
                                 | |
| 10000 | 1 | 
                                    
                                    0.5%
                                 | |
| 15000 | 1 | 
                                    
                                    0.5%
                                 | |
| Sysmiss | 1223 |