Column titles:
[1] - Windows 10
[2] - MacOS
[3] - Unix
[4] - iOS iPhone
Date          [1]      [2]      [3]      [4]
10 May          2        0        0        0
11 May          1        0        0        0
12 May          2        0        0        0
13 May          0        0        0        0
14 May          2        0        0        0
15 May          2        0        0        0
16 May          1        0        0        0
17 May          0        0        0        0
18 May          1        1        0        0
19 May          3        0        0        0
20 May          2        0        0        0
21 May          0        0        0        1
22 May          2        0        0        0
23 May          3        0        1        0
24 May          3        0        0        0
25 May          3        0        0        0
26 May          2        0        0        0
27 May          4        0        0        0
28 May          2        1        0        0
29 May          1        0        0        1
30 May          0        0        0        0
31 May          1        0        0        0
1 Jun.          0        0        0        0
2 Jun.          1        0        0        0
3 Jun.          0        0        0        2
4 Jun.          3        0        1        0
5 Jun.          1        0        0        1
6 Jun.          0        1        0        1
7 Jun.          1        0        0        1
8 Jun.          0        1        0        0
9 Jun.          1        0        0        0