The given bar chart exhibits the amount of children from distinct age categories common classes in various countries.
In general, to begin with Japan and Hong Kong represent the highest number in average classes. While Russia is lowest one in this categories, but Unit States has the sane range with global average.
Firstly, Japan the regular number in class at the age of 9 is around 31 children, but a steady increased happen at the age of 13 which represent approximately 35 in a single class. In contrast Hong Kong dominated at the age of 9 with over 35 which ranked topest at that categories, while at the stage of 13 present almost 31 students per class which is opposite of Japan.
Russia which illusrates the lowest member in single class in both stages of life 9 and 13 with around 11 respectively. Along with, United States and global average of at stage of 9 the both depict around 22 children in average. However, at the stage of 13 a steady decline at average of 13 years old children with near to 20 per class.