 The total Swiss population change in 2008 (from all sources, including moves across municipal borders) was a decrease of 3 and the non-Swiss population change was an increase of 6 people.This represents a population growth rate of 0.5%.The age distribution, , in Vira (Gambarogno) is; 53 children or 7.8% of the population are between 0 and 9 years old and 45 teenagers or 6.6% are between 10 and 19.