Column titles:
[1] - Moscow
[2] - Saint-Petersburg
[3] - Chelyabinsk
[4] - Volgograd
[5] - Undefined
Date          [1]      [2]      [3]      [4]      [5]
15 Apr.         9        3        2        1        0
16 Apr.         5        3        0        1        1
17 Apr.        12        2        0        0        0
18 Apr.        12        0        0        1        0
19 Apr.         3        4        0        1        0
20 Apr.         6        0        0        0        1
21 Apr.         9        2        1        1        0
22 Apr.        15        2        1        0        1
23 Apr.        11        2        0        1        1
24 Apr.        12        0        1        2        0
25 Apr.        12        3        1        0        0
26 Apr.         5        0        0        1        1
27 Apr.        10        0        0        0        1
28 Apr.         8        2        1        1        0
29 Apr.        14        0        1        1        1
30 Apr.         7        1        0        0        0
1 May           6        0        0        0        0
2 May           6        0        0        0        1
3 May           8        2        0        0        0
4 May           6        0        1        0        0
5 May           6        1        1        1        1
6 May          14        2        1        1        1
7 May           8        1        2        1        0
8 May           6        1        0        1        0
9 May           8        1        0        0        2
10 May          5        0        0        0        0
11 May          5        0        0        0        0
12 May          8        0        1        1        2
13 May         10        1        2        1        2
14 May         13        4        0        0        1
15 May         10        1        0        1        2