| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 | 
                                    
                                    8%
                                 | 
| -7 | Does not apply | 78 | 
                                    
                                    25.1%
                                 | 
| 1200 | 3 | 
                                    
                                    1%
                                 | |
| 1450 | 1 | 
                                    
                                    0.3%
                                 | |
| 1500 | 1 | 
                                    
                                    0.3%
                                 | |
| 1800 | 1 | 
                                    
                                    0.3%
                                 | |
| 2160 | 1 | 
                                    
                                    0.3%
                                 | |
| 2400 | 16 | 
                                    
                                    5.1%
                                 | |
| 2500 | 2 | 
                                    
                                    0.6%
                                 | |
| 2600 | 2 | 
                                    
                                    0.6%
                                 | |
| 2880 | 1 | 
                                    
                                    0.3%
                                 | |
| 3120 | 1 | 
                                    
                                    0.3%
                                 | |
| 3460 | 1 | 
                                    
                                    0.3%
                                 | |
| 3560 | 1 | 
                                    
                                    0.3%
                                 | |
| 3800 | 1 | 
                                    
                                    0.3%
                                 | |
| 4000 | 1 | 
                                    
                                    0.3%
                                 | |
| 5000 | 2 | 
                                    
                                    0.6%
                                 | |
| 6000 | 2 | 
                                    
                                    0.6%
                                 | |
| 7200 | 1 | 
                                    
                                    0.3%
                                 | |
| 8000 | 2 | 
                                    
                                    0.6%
                                 | |
| 10000 | 4 | 
                                    
                                    1.3%
                                 | |
| 12000 | 68 | 
                                    
                                    21.9%
                                 | |
| 12500 | 1 | 
                                    
                                    0.3%
                                 | |
| 14400 | 4 | 
                                    
                                    1.3%
                                 | |
| 14500 | 1 | 
                                    
                                    0.3%
                                 | |
| 14958 | 1 | 
                                    
                                    0.3%
                                 | |
| 15000 | 15 | 
                                    
                                    4.8%
                                 | |
| 15120 | 1 | 
                                    
                                    0.3%
                                 | |
| 17250 | 1 | 
                                    
                                    0.3%
                                 | |
| 18000 | 14 | 
                                    
                                    4.5%
                                 | |
| 18700 | 1 | 
                                    
                                    0.3%
                                 | |
| 19200 | 1 | 
                                    
                                    0.3%
                                 | |
| 19592 | 1 | 
                                    
                                    0.3%
                                 | |
| 20000 | 4 | 
                                    
                                    1.3%
                                 | |
| 21000 | 1 | 
                                    
                                    0.3%
                                 | |
| 24000 | 21 | 
                                    
                                    6.8%
                                 | |
| 24282 | 1 | 
                                    
                                    0.3%
                                 | |
| 27000 | 2 | 
                                    
                                    0.6%
                                 | |
| 27517 | 1 | 
                                    
                                    0.3%
                                 | |
| 30000 | 7 | 
                                    
                                    2.3%
                                 | |
| 30889 | 1 | 
                                    
                                    0.3%
                                 | |
| 36000 | 2 | 
                                    
                                    0.6%
                                 | |
| 45000 | 1 | 
                                    
                                    0.3%
                                 | |
| 48000 | 1 | 
                                    
                                    0.3%
                                 | |
| 50000 | 1 | 
                                    
                                    0.3%
                                 | |
| 56000 | 1 | 
                                    
                                    0.3%
                                 | |
| 57000 | 2 | 
                                    
                                    0.6%
                                 | |
| 59880 | 1 | 
                                    
                                    0.3%
                                 | |
| 60830 | 1 | 
                                    
                                    0.3%
                                 | |
| 76850 | 1 | 
                                    
                                    0.3%
                                 | |
| 78000 | 1 | 
                                    
                                    0.3%
                                 | |
| 84000 | 2 | 
                                    
                                    0.6%
                                 | |
| 105000 | 1 | 
                                    
                                    0.3%
                                 | |
| 142000 | 1 | 
                                    
                                    0.3%
                                 | |
| 144000 | 1 | 
                                    
                                    0.3%
                                 |