Table 1.
Characteristics of a respondents

		Number of respondents	Proportion
Total		2,500	100
Gender	Men	1,264	50.6
	Women	1,236	49.4
Age	Under 29 years	461	18.4
	30 – 39 years	435	17.4
	40 – 49 years	524	21.0
	50 – 59 years	540	21.6
	Above 60 years	540	21.6
Level of education	Less high school graduate	466	18.6
	Attending university	110	4.4
	University graduate	1,688	67.5
	Post-graduate degree	236	9.4
Household income	Less than KRW 3 million	675	27.0
	KRW 3 – 5 million	752	30.1
	KRW 5 – 7 million	601	24.0
	KRW > 7 million	472	18.9
Age of the youngest child	Under 7 years	263	10.5
	Elementary school	258	10.3
	Middle and high school	253	10.1
	Undergraduate/adult	772	30.9
	No kids	954	38.2
Residential district	Capital area	1,274	51.0
	Non-capital area	1,226	49.0
	Metropolitan city	1,126	45.0
	Provincial area	1,374	55.0