TABLE 1.

Frequency and percentage of the sample.

Variable	Options	Frequency	Percentage	Variable	Options	Frequency	Percentage
Gender	Male	69	17.4	Age	Under 30 years old	143	36.1
	Female	327	82.6		31–40 years old	125	31.6
Education	Undergraduate	375	94.7		41–50 years old	110	27.8
	Postgraduate	21	5.3		Over 50 years old	18	4.5
Year	Under 5 years	80	20.2	Income	Under 3,000 yuan	9	2.3
	6–10 years	103	26.0		3,000–5,000 yuan	113	28.5
	11–15 years	85	21.5		5,000–7,000 yuan	138	34.8
	16–20 years	68	17.2		7,000–10,000 yuan	99	25
	Over 20 years	60	15.2		Over 10,000 yuan	37	9.3