Column titles:
[1] - Windows 10
[2] - MacOS
[3] - Unix
[4] - iOS iPhone
Date          [1]      [2]      [3]      [4]
10 May       66.7        0        0        0
11 May       33.3        0        0        0
12 May        100        0        0        0
13 May          0        0        0        0
14 May        100        0        0        0
15 May        100        0        0        0
16 May        100        0        0        0
17 May          0        0        0        0
18 May         50       50        0        0
19 May        100        0        0        0
20 May        100        0        0        0
21 May          0        0        0       50
22 May        100        0        0        0
23 May         75        0       25        0
24 May        100        0        0        0
25 May        100        0        0        0
26 May        100        0        0        0
27 May       57.1        0        0        0
28 May         50       25        0        0
29 May         25        0        0       25
30 May          0        0        0        0
31 May        100        0        0        0
1 Jun.          0        0        0        0
2 Jun.         50        0        0        0
3 Jun.          0        0        0     66.7
4 Jun.         50        0     16.7        0
5 Jun.       33.3        0        0     33.3
6 Jun.          0       50        0       50
7 Jun.         50        0        0       50
8 Jun.          0       50        0        0
9 Jun.       33.3        0        0        0