year | Total number of deliveries | Number of PH | Rate of PH/1000 deliveries |
2014 | 24563 | 12 | 0.4 |
2015 | 23503 | 7 | 0.2 |
2016 | 24654 | 12 | 0.4 |
total | 72720 | 31 | 0.4 |