A survey every year of 5000 people is conducted by the World Health Organization (WHO). WHO found that in the years 2015, 2016, 2017, 2018, and 2019 the percentage of people affected by Dengue were 20%, 30%, 40%, 30%, and 40%. WHO also found that every year out of the affected people 50% were students, 20% were housewives and 30% were drivers. The number of housewives, students, and drivers was in the ratio 15 : 20 : 5, every year.