Table 1.

Main characteristics of the sample.

Type	Option	Quantity	Proportion	Type	Option	Quantity	Proportion
Sex	Male	248	80.8	Education level	Primary school and below	235	76.5
	Female	59	19.2		Junior high school and above	72	23.5
Age	Under 44	97	31.6	Labor input	1–3	216	70.4
	45–59	162	52.8		4–7	85	27.7
	Over 59	48	15.6		Over 7	6	1.9