Age (years)

Girls n (%)

Cumulative percentage

Boys

n (%)

Cumulative percentage

Both sexes n (%)

Total cumulative percentage (%)

8 - 9

0 (0.0)

0

3 (1.4)

1.4

3 (0.5)

0.5

9 - 10

4 (1.2)

1.2

3 (1.4)

2.8

7 (1.3)

1.8

10 - 11

1 (0.3)

1.5

3 (1.4)

4.2

4 (0.7)

2.5

11 - 12

15 (4.4)

5.9

8 (3.8)

8.0

23 (4.2)

6.7

12 - 13

25 (7.4)

13.3

9 (4.3)

12.3

34 (6.2)

12.9

13 - 14

35 (10.4)

23.7

19 (9.1)

21.4

54 (9.9)

22.8

14 - 15

46 (13.6)

37.3

27 (13.0)

34.4

73 (13.4)

36.2

15 - 16

71 (21.0)

58.3

38 (18.3)

52.7

109 (20.0)

56.2

16 - 17

47 (13.9)

72.2

38 (18.3)

71.0

85 (15.6)

71.8

17 - 18

43 (12.7)

84.9

32 (15.4)

86.4

75 (13.7)

85.5

18 - 19

32 (9.5)

94.4

13 (6.3)

92.7

45 (8.2)

93.7

19 - 20

19 (5.6)

100.0

15 (7.2)

99.9

34 (6.2)

99.9

Total

338 (100.0)

208 (99.9)

546 (99.9)