The missing ages:  adjusting for digit preference.
Gray
A
A
D000349:Africa; D000352:Africa, Northern; D017677:Age Distribution; D000367:Age Factors; D001208:Asia; D001315:Australia; D001459:Bangladesh; D015982:Bias; D003625:Data Collection; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D005006:Ethnicity; D008002:Libya; D008722:Methods; D008877:Middle East; D010139:Pacific Islands; D011153:Population; D011154:Population Characteristics; D012106:Research; D012107:Research Design; D000095283:Australian Aboriginal and Torres Strait Islander Peoples
Africa; Age Distribution; Age Factors; Age Reporting; Arab Countries; Asia; Australia; Bangladesh; Bias; Data Adjustment; Data Collection; Data Reporting; Demographic Factors; Developed Countries; Developing Countries; Error Sources; Indigenous Population; Libya; Measurement; Mediterranean Countries; Methodological Studies; Northern Africa; Oceania; Population; Population Characteristics; Research Methodology; Southern Asia