Objective-C
#1 361
#2 261
#3 166
#4 70
#5 40
#6 33
#7 27
#8 16
#9 16
#10 12
#11 12
#12 10
#13 8
#14 6
#15 5
#16 4
#17 4
#18 4
#19 1
#20 1
#21 1