The age range information of AIP4 students:

0 0 8 7 8 3 1 1 0.0%  0.0%  28.6% 25.0% 28.6% 10.7% 3.5% 3.5% Under 10 Under 20 Under 30 Under 40 Under 50 Under 60 Under 70 70 and over