Table 1 Convenience quota sampling of the survey

Item	25~59 single	25~34 married	35~39	40~44	45~49	50~54	55~59	>60	Total
Seoul metropolitan area	14	45	47	42	47	49	46	32	322
Large city	22	29	36	28	30	32	27	26	230
Small and medium city	27	22	27	22	25	24	23	20	190
Total	63	96	110	92	102	105	96	78	742