Incidence of polycythemia vera ranged 0.01 to 2.61 per 100.000 population and the prevalence ranging from 0.49 to 46.88 per 100.000 population. Incidence of essential thrombocythemia is 0.21 to 2.27 per 100.000 population, prevalence ranging between 11.00 - 42.51 per 100.000 population.