TABLE 1.

Descriptive statistics.

Characteristic	Category	Frequency	Percentage
Gender	Male	144	60.25
	Female	95	39.75
Age	20 and below	19	7.95
	21 to 29	35	14.64
	30 to 39	62	25.94
	40 to 49	48	20.08
	50 to 59	40	16.74
	60 and above	35	14.64
Education level	Never attended school	75	31.38
	Primary school	100	41.84
	Middle school	51	21.34
	High school and above	13	5.44
Per capita annual income	Less than 2300 yuan	44	18.41
	2301 to 3000 yuan	57	23.85
	3001 to 5000 yuan	70	29.29
	5001 to 8000 yuan	31	12.97
	8001 to 11000 yuan	15	6.28
	11001 yuan and above	22	9.21
Residence length	5 years and below	12	5.02
	6 to 10 years	39	16.32
	11 to 20 years	21	8.79
	21 years and above	167	69.87