Year | Observation period | <3 years of age | 3 - 4 years of age | Total (<5 years of age) |
2011 | Epidemic months* | 397 | - | 397*** |
| Extended period** | 542 | - | 542*** |
2012 | Epidemic months* | 355 | 214 | 569 |
| Extended period** | 857 | 407 | 1264 |
2013 | Epidemic months* | 398 | 242 | 640 |
| Extended period** | 783 | 452 | 1235 |
2014 | Epidemic months* | 323 | 274 | 597 |
| Extended period** | 407 | 330 | 737 |
Total | Epidemic months | 1473 | 730 | 2203 |
| Extended period | 2589 | 1189 | 3778 |