Table 1.

Background of participants.

Items	Frequency	Percent	Items	Frequency	Percent
Gender			Education background
Male	329	54.3%	Junior high school or below 21		3.5%
Female	277	45.7%	Senior high school	111	18.3%
Age			Junior college	129	21.3%
21–30	233	38.4%	University	311	51.3%
31–40	262	43.2%	Master or Doctor	34	5.6%
41–50	81	13.4%	Monthly income ($)
51 or over	30	5.0%	510 or below	174	28.7%
Number of experiences			510–730	140	23.1%
Once	84	13.9%	731–1160	153	25.2%
2–3 times	224	37.0%	1160–1820	103	17.0%
4–5 times	115	19.0%	1821–5600	32	5.3%
6 times or over	183	30.2%	5601 or over	4	0.7%