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, inn 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.

The answer would be 484