Combining age groups together, those aged 14 and below, consisting of the the young dependent population which include infants/babies, children and young adolescents/teenagers, make up an aggregate of 34.03% (599). Those aged 15 up to 64, roughly, the economically active population and actual or potential members of the work force, constitute a total of 61.99% (1,091). Finally, old dependent population consisting of the senior citizens, those aged 65 and over, total 3.98% (70) in all.
The computed Age Dependency Ratios mean that among the population of Sungay, there are 55 youth dependents to every 100 of the working age population; there are 6 aged/senior citizens to every 100 of the working population; and overall, there are 61 dependents (young and old-age) to every 100 of the working population.
The median age of 23 indicates that half of the entire population of Sungay are aged less than 23 and the other half are over the age of 23.
The population of Sungay grew from 1,579 in 1990 to 1,760 in 2015, an increase of 181 people. The latest census figures in 2015 denote a negative growth rate of 2.32%, or a decrease of 231 people, from the previous population of 1,991 in 2010.