les titres des colonnes:
[1] - /
[2] - sitevisits/
[3] - promo/
[4] - tasks/
Date          [1]      [2]      [3]      [4]
3 nov        51.9     22.4     11.5      5.1
10 nov       74.5      4.3      5.3      6.4
17 nov       69.1      7.4      4.4      8.8
24 nov       58.3     16.7      2.4      7.1
1 dec        76.6     14.1      3.1      4.7
8 dec        69.8      7.9        0      4.8
15 dec       33.2     0.23    0.026      0.1
22 dec       62.7      9.6      3.6        6
29 dec       58.9     17.8     15.1      2.7
5 jan        48.8     24.4      4.9      7.3
12 jan       57.7     15.4      3.8      7.7
19 jan       58.8     21.6        2      7.8
26 jan       64.3     14.3      3.6        0
2 fev        99.7    0.083    0.014    0.056
9 fev        96.5      1.1      1.6     0.11
16 fev       92.4      2.8        0      1.3
23 fev       23.3     32.9      1.4      5.5
2 mar        71.4      7.1        0        0
9 mar        36.9     24.6      3.1      7.7
16 mar         32       32        0        4
23 mar       58.9     16.1      3.6     10.7
30 mar       60.5     14.5        0      6.6
6 avr        59.5      2.7     10.8     10.8
13 avr       46.7       20      2.2     15.6
20 avr         50     18.8        0      9.4
27 avr       56.1     24.4      4.9      2.4
4 mai          52       12        8       12
11 mai         44       24        0       12
18 mai       70.6     23.5        0        0
25 mai       57.1       25     10.7      7.1
27 mai       36.4     36.4        0      9.1