Population Ages 15 to 64 for Low and Middle Income Countries was 65.22983 % of Total in January of 2020, according to the United States Federal Reserve. Historically, Population Ages 15 to 64 for Low and Middle Income Countries reached a record high of 65.43121 in January of 2015 and a record low of 55.05920 in January of 1967. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Ages 15 to 64 for Low and Middle Income Countries - last updated from the United States Federal Reserve on April of 2024.