Plain language definition: Not applicable Detailed definition: Refers to the age at last birthday before the reference date, that is, before May 10, 2011. Values (English): Total - Age groups Under 15 years 15 years and over 15 to 24 years 25 to 54 years 25 to 34 years 35 to 44 years 45 to 54 years 55 to 64 years 65 years and over