n

%

Mothers age (years)

15 - 20

21 - 30

≥31

162

297

104

28.8

52.8

18.4

Formal school education of mothers

Yes

No

52

511

9.2

90.8

Living children number by mother

1

2 - 3

4 - 6

≥6

146

235

154

28

25.9

41.7

27.4

5.0

Number of pregnancies by mother

1

2 - 6

≥6

118

381

64

21.0

67.7

11.4