| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    1.9%
                                 | 
| -7 | No electricity from a utility (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 75 | 
                                    
                                    47.8%
                                 | |
| 9 | 1 | 
                                    
                                    0.6%
                                 | |
| 50 | 1 | 
                                    
                                    0.6%
                                 | |
| 180 | 1 | 
                                    
                                    0.6%
                                 | |
| 200 | 2 | 
                                    
                                    1.3%
                                 | |
| 273 | 1 | 
                                    
                                    0.6%
                                 | |
| 300 | 1 | 
                                    
                                    0.6%
                                 | |
| 380 | 1 | 
                                    
                                    0.6%
                                 | |
| 400 | 1 | 
                                    
                                    0.6%
                                 | |
| 480 | 1 | 
                                    
                                    0.6%
                                 | |
| 600 | 3 | 
                                    
                                    1.9%
                                 | |
| 617 | 1 | 
                                    
                                    0.6%
                                 | |
| 669 | 1 | 
                                    
                                    0.6%
                                 | |
| 750 | 1 | 
                                    
                                    0.6%
                                 | |
| 800 | 2 | 
                                    
                                    1.3%
                                 | |
| 1000 | 6 | 
                                    
                                    3.8%
                                 | |
| 1200 | 2 | 
                                    
                                    1.3%
                                 | |
| 1250 | 1 | 
                                    
                                    0.6%
                                 | |
| 1300 | 2 | 
                                    
                                    1.3%
                                 | |
| 1400 | 2 | 
                                    
                                    1.3%
                                 | |
| 1500 | 5 | 
                                    
                                    3.2%
                                 | |
| 1600 | 1 | 
                                    
                                    0.6%
                                 | |
| 1680 | 1 | 
                                    
                                    0.6%
                                 | |
| 1800 | 5 | 
                                    
                                    3.2%
                                 | |
| 1900 | 1 | 
                                    
                                    0.6%
                                 | |
| 2000 | 12 | 
                                    
                                    7.6%
                                 | |
| 2100 | 3 | 
                                    
                                    1.9%
                                 | |
| 2400 | 1 | 
                                    
                                    0.6%
                                 | |
| 2500 | 2 | 
                                    
                                    1.3%
                                 | |
| 2800 | 1 | 
                                    
                                    0.6%
                                 | |
| 2900 | 1 | 
                                    
                                    0.6%
                                 | |
| 3000 | 9 | 
                                    
                                    5.7%
                                 | |
| 4000 | 1 | 
                                    
                                    0.6%
                                 | |
| 5000 | 1 | 
                                    
                                    0.6%
                                 | |
| 6300 | 1 | 
                                    
                                    0.6%
                                 | |
| 20000 | 1 | 
                                    
                                    0.6%
                                 | |
| 24000 | 1 | 
                                    
                                    0.6%
                                 | |
| 36000 | 1 | 
                                    
                                    0.6%
                                 |