Table 1 Demographic characteristics

Category Frequency %
Gender Male 53 36.3
Female 93 63.7
Total 146 100.0
Age ≥ 19 12 8.2
20∼29 41 28.1
30∼39 47 32.2
40∼49 15 10.3
50∼59 13 8.9
≦ 60 18 12.3
Total 146 100.0
Stay time Less than 30 min 15 10.3
half hour∼1 hour 46 31.5
1∼2 hours 59 40.4
More than 2 hours 26 17.8
Total 146 100.0
Site hit frequency More than once a month 51 34.9
Less than once a month 95 65.1
Total 146 100.0