Average age of scouts at scout jamboree?

Scout jamboree is an event every four years where boys scouts from different areas are enjoined in a camp for a number of days to bond and to develop skills through activities mentally, physically and most importantly, socially. Historically, in n 1949, the average age of scouts who were joining the camp was 14.6 years. while it ramped up to 17.35 years old when it reached in 2016.