Young
the population was predominately young in the southern colonies
Young; Mexico's median age is of 26.3 years (2009 est.)
Most were young with families.
the old, the young are just following their elders example
young of course. Old would be in the range of maybe 60 or 70 + and youth is anywhere from infant to middle age
probably the old. most likely
Mae Young who is 85
Young's Bluecrest's population is 3,000.
infants, young children
Lichen planus affects between 1-2% of the population, most of whom are middle-aged women. The condition is less common in the very young and the very old.
The current population in the Philippines is estimated to be around 110 million people. The country has a young population, with a median age of around 25 years old, and is one of the most densely populated countries in the world. Rapid urbanization and high birth rates are contributing factors to the population growth.
I don't know how old you mean but China is for ages 15-19