date attendance
1 2/9/2015 74
2 2/11/2015 80
3 2/16/2015 73
4 2/18/2015 79
5 2/23/2015 72
6 2/25/2015 72
7 3/2/2015 61
8 3/4/2015 73
9 3/9/2015 68
10 3/23/2015 69
11 3/25/2015 76
12 3/30/2015 64
13 4/1/2015 71
14 4/6/2015 51
15 4/8/2015 68
16 4/13/2015 57
17 4/15/2015 63
18 4/20/2015 74
19 4/22/2015 80
20 4/27/2015 73
[1] "" "graphs were confusing"
Surveys: 02.09.15, 02.11.15, 02.16.15, 02.18.15, 02.23.15, 02.25.15, 03.02.15, 03.04.15, 03.09.15, 03.23.15, 03.25.15, 03.30.15, 04.01.15, 04.06.15, 04.08.15, 04.13.15, 04.15.15