Table 2 Socio-economic ranking of the countries with at least 30 articles on P&H, n number of articles, GDP gross domestic product in purchase power parity (PPP) in current international $, R_GDP number of articles / GDP in 1000 bn PPP, R_POP number of articles / population in mill [14]. HI high-income country, UMI upper-middle-income country, LMI lower-middle-income country [15], ranked by R_GDP

New Zealand

43

0.22

4.78

198.97

HI 1

8.99

HI 2

UK

611

3.26

67.53

187.68

HI 2

9.05

HI 1

South Africa

136

0.76

58.56

178.66

UMI 1

2.32

UMI 1

Kenya

42

0.24

52.57

177.16

LMI 1

0.80

LMI 1

Canada

295

1.93

37.41

152.86

HI 3

7.89

HI 3

Australia

164

1.35

25.20

121.26

HI 4

6.51

HI 6

USA

2512

21.37

328.24

117.52

HI 5

7.65

HI 4

Sweden

62

0.57

10.04

108.00

HI 6

6.18

HI 7

Switzerland

62

0.61

8.59

101.85

HI 7

7.22

HI 5

Norway

32

0.36

5.38

89.53

HI 8

5.95

HI 8

Belgium

53

0.63

11.54

84.61

HI 9

4.59

HI 9

Chile

37

0.48

18.95

77.61

HI 10

1.95

HI 11

Colombia

42

0.79

50.34

53.33

UMI 2

0.83

UMI 2

Netherlands

55

1.03

17.10

53.16

HI 11

3.22

HI 10

Bangladesh

37

0.81

163.05

45.84

LMI 2

0.23

LMI 2

Nigeria

43

1.07

200.96

40.01

LMI 3

0.21

LMI 3

Brazil

113

3.22

211.05

35.09

UMI 3

0.54

UMI 4

Argentina

35

1.03

44.78

33.94

UMI 4

0.78

UMI 3

Spain

64

1.99

46.74

32.20

HI 12

1.37

HI 13

Germany

123

4.66

83.52

26.40

HI 13

1.47

HI 12