Dependency ratios provide simple summary measures of age composition, with respect to relative numbers of ‘dependent’ and ‘productive’ groups.
The ratios are typically based on a division of the age range into three broad, somewhat crude groupings: children, working ages and older people. For the purposes of Release 1A, the two dependency ratios used are:
- the number of children aged under 15 per hundred people aged 15-64 (i.e. mainly those of working age); and
- the number of people aged 65 or more per hundred of people aged 15-64.