 This represents a population growth rate of -4.8%.The age distribution, , in Valcolla is; 50 children or 8.1% of the population are between 0 and 9 years old and 53 teenagers or 8.6% are between 10 and 19.Of the adult population, 63 people or 10.2% of the population are between 20 and 29 years old.