7 - 9 years

10 - 12 years

13 - 15 years

≥15 years

Total

n/N (%)

n/N (%)

n/N (%)

n/N (%)

n/N (%)

D1

1/136 (0.7)

3/215 (14.0)

2/107 (1.9)

1/6 (16.7)

7/464 (1.5)

D2

6/142 (4.2)

29/325 (8.9)

15/118 (12.7)

1/8 (12.5)

51/593 (8.6)

D3

5/183 (2.7)

18/307 (5.9)

10/95 (10.5)

0/7 (0.0)

33/592 (5.6)

D4

4/160 (2.5)

15/310 (4.8)

9/125 (7.2)

0/1 (0.0)

28/596 (4.7)

D5

5/204 (2.5)

19/350 (5.4)

3/141 (2.1)

2/4 (5.0)

29/699 (4.1)

Total

21/825 (2.5)

84/1507 (5.6)

39/586 (6.7)

4/26 (15.4)

148/2944 (5.0)