Table 1 Demographic characteristics of the interviewees

Sex

 Male

53

57

 Female

40

43

Age

 20–29

13

14

 30–39

34

36.6

 40–49

16

17.2

 50–59

8

8.6

 60–69

12

12.9

 >70

10

10.7

Ethnic group

 Bulang

48

51.6

 Dai

30

32.3

 Hani

2

2.1

 Han

9

9.7

 Lahu

2

2.1

 Yao

1

1.1

 Yi

1

1.1

Formal education

 Illiterate

12

12.9

 Primary school

54

58.1

 Middle school

20

21.5

 High school

3

3.2

 Junior college

3

3.2

 Bachelor degree

1

1.1

Main occupation

 Farmer

90

96.7

 Local official

1

1.1

 Teacher

1

1.1

 Forest ranger

1

1.1