Percent children - Country rankings:
The average for 2017 was 27.57 percent.The highest value was in Niger: 50.2 percent and the lowest value was in Hong Kong: 11.49 percent. Below is a chart for all countries where data are available for: Percent children.
Population ages 0-14, percent of total, 2017
(percent, Source: United Nations Population Division, TheGlobalEconomy.com)