Column titles:
[1] - Visitors during a day
[2] - New (or were not present during 31 days)
[3] - Continual (present every day during a week)
[4] - Main body (present every week during a month)
Date          [1]      [2]      [3]      [4]
13 Apr.         2        0        0        0
14 Apr.         5        2        1        0
15 Apr.         3        2        1        0
16 Apr.         4        2        1        0
17 Apr.         7        5        1        0
18 Apr.         1        0        1        0
19 Apr.         4        2        1        0
20 Apr.         2        1        1        0
21 Apr.         3        2        1        0
22 Apr.         2        1        1        0
23 Apr.         5        4        1        0
24 Apr.         3        2        1        0
25 Apr.         5        4        1        0
26 Apr.         1        0        1        0
27 Apr.         4        3        1        0
28 Apr.         2        1        1        0
29 Apr.         3        2        1        0
30 Apr.         5        3        1        0
1 May           4        3        1        0
2 May           4        2        1        0
3 May           3        2        1        0
4 May           1        0        1        0
5 May           5        4        1        0
6 May           4        3        1        0
7 May           3        2        1        0
8 May           5        4        1        0
9 May           4        0        1        1
10 May          4        2        1        1
11 May          3        1        1        1
12 May          4        1        1        1
13 May          1        0        1        1