| Reasons | Frequency | Percentage |
| Vote buying | 136 | 31.4 |
| Clean Registry Act | 106 | 24.5 |
| Sealed ducts | 53 | 12.2 |
| Ineligibilities | 47 | 10.9 |
| Power Abuse | 32 | 7.4 |
| Slush Funds | 17 | 3.9 |
| Professional Mayor | 15 | 3.5 |
| Formal irregularity | 14 | 3.2 |
| Nepotism | 7 | 1.6 |
| Impeachment | 3 | 0.7 |
| Vacancy | 3 | 0.7 |
| Total | 433 | 100.0 |