The diagram illustrates the percentage of children aged 9 and 13 enrolled in average-sized classes across several countries.
Overall, Japan and Hong Kong have the highest percentages, both exceeding 30%, while Russia has the lowest, at only 10%. The United States stands in the middle, matching the global average of 20%.
In Japan, more 13-year-olds are in average-sized classes compared to 9-year-olds. In contrast, Hong Kong shows the opposite trend, with a higher percentage of 9-year-olds. Despite the age difference, both countries lead in terms of overall enrollment.
The U.S. has a noticeable gap between age groups, with 9-year-olds more represented than 13-year-olds. Russia, on the other hand, shows equal proportions for both ages, but at much lower levels.
