Age group/year

Frequency

Cumulative frequency

Cumulative %

<30

18

18

6.16

31 - 40

80

98

33.56

41 - 50

101

199

68.15

51 - 60

48

247

84.58

61 - 70

31

278

95.2

71 - 80

13

291

99.65

>80

1

292

100