les titres des colonnes:
[1] - Windows 10
[2] - Windows 7
[3] - Android
[4] - Windows 8
[5] - MacOS
Date          [1]      [2]      [3]      [4]      [5]
6 oct        51.8     23.7      6.1      8.8      3.5
13 oct         50     23.9     10.2      4.5      2.3
20 oct       59.6     19.1      7.9      6.7        0
27 oct       52.2     26.7      6.7      4.4      3.3
3 nov        54.3     24.5      5.3      8.5      1.1
10 nov       60.4     23.1      4.4      4.4      2.2
17 nov       63.5     18.3      8.7      3.8      1.9
24 nov       52.7     27.3      4.5      3.6      2.7
1 dec        43.3       24      7.7      8.7      6.7
8 dec        63.7     16.3      8.9      5.2      1.5
15 dec         50     24.1      8.3      9.3      1.9
22 dec       56.8     17.9      8.4      8.4      2.1
29 dec       50.5     16.1     10.8      8.6      7.5
5 jan        45.3     24.4        7        7      3.5
12 jan       56.5     21.7      2.9     10.1      1.4
19 jan       48.7       25     12.5      6.2      2.5
26 jan         60       19      9.5      2.9      1.9
2 fev        74.1       12      5.6      1.9      1.9
9 fev        88.9      1.2      9.4     0.22        0
16 fev       70.9      9.9      7.1      5.7     0.71
23 fev       66.5     11.7      8.9      4.5      1.7
2 mar        60.3     16.8     11.5      3.8        0
9 mar        55.4     22.3      7.1        8      1.8
16 mar       61.3     13.2      8.5     11.3      1.9
23 mar       66.7     15.9      7.9      3.2        0
30 mar       66.3     15.8      6.9        4        0
6 avr        68.8       17      6.2      2.7     0.89
13 avr       60.7     16.6        9      7.6     0.69
20 avr         75     10.6      3.8      3.8      2.3
27 avr         50     19.8      9.4      8.5      1.9
30 avr       47.7     11.4      4.5      9.1      9.1