Table 1 Year of survey for each studied countries and sampled population

Angola

2015/16

6361

3.77

2.03

Burkina Faso

2010

9964

5.90

24.31

Benin

2017/18

8331

4.93

64.39

Burundi

2016/17

7621

4.51

67.60

Congo Democratic Republic

2013/14

9551

5.65

55.64

Côte d’Ivoire

2011/12

4495

2.66

37.50

Cameroon

2018/19

5013

2.97

29.82

Ethiopia

2016

6662

3.94

5.73

Gabon

2012

2875

1.70

71.58

Ghana

2014

3631

2.15

39.71

Gambia

2013

4974

2.94

40.82

Guinea

2018

5138

3.04

38.07

Kenya

2014

5904

3.50

31.81

Comoros

2012

1878

1.11

63.16

Liberia

2013

4035

2.39

58.56

Mali

2018

6066

3.59

50.15

Malawi

2016/17

11,070

6.55

51.88

Nigeria

2018

14,185

8.40

51.61

Rwanda

2014/15

4741

2.81

49.98

Sierra-Leone

2019

6090

3.61

84.10

Senegal

2010/11

7571

4.48

25.01

Chad

2014/15

10,248

6.07

23.31

Togo

2013/14

4556

2.70

57.16

Uganda

2016

8429

5.00

60.50

Zambia

2018/19

5496

3.25

77.76

Zimbabwe

2015

4025

2.38

3.57

Total

168,910

100.00