What is dependency ratio?
dependency ratio is An indicator used in population studies to measure the portion of the population which is economically dependent on active age groups. It is calculated as the sum of the 0-14 year-olds and the over 60 or 65 year-olds, depending on the working age limit considered, divided by the number of people aged between 15 and 59 or 64, respectively.
source: A GLOSSARY OF TERMS FOR COMMUNITY HEALTH CARE AND SERVICES FOR OLDER PERSONS. World Health Organization, 2004.