Table 1 Characteristics of Wuxi CDC WOA subscribers

City

 First tier

22,460(2.52%)

 Second tier

61,236 (6.87%)

 Third tier

735,999(82.59%)

 Fourth tier and below

66,170 (7.42%)

 unknown^{Footnote 1}

5314 (0.59%)

Gender

 male

349,856(39.3%)

 female

523,576(58.75%)

 unknown

17,738(1.99%)

Age

 Less than 18

5914(0.66%)

 18–25

110,328(12.38%)

 26–35

388,887(43.63%)

 36–45

272,785(30.6%)

 46–60

95,318(10.69%)

 Above 60

18,118(2.03%)