New data for popbyage. NOTE: Cutoff at age 80 for years 1950-1990, and cutoff att age 100 for years 1990-2100
http://esa.un.org/unpd/wpp/Excel-Data/EXCEL_FILES/5_Interpolated/WPP2012_INT_F03_1_POPULATION_BY_AGE_ANNUAL_BOTH_SEXES.XLS