les titres des colonnes:
[1] - 1 jour
[2] - 2 jours
[3] - 3-4 jours
[4] - 5-7 jours
Date          [1]      [2]      [3]      [4]
20 oct       89.8      6.5      2.5      1.2
27 oct       90.9        6      1.8      1.3
3 nov        90.5      4.8      2.5      2.2
10 nov       92.5      3.5      2.6      1.4
17 nov       89.8      6.6      1.6        2
24 nov         91      4.4      3.8     0.86
1 dec        92.3      5.6      1.5     0.69
8 dec        91.5      7.1      1.1     0.35
15 dec       91.6      4.7      2.3      1.4
22 dec       91.3      5.6      1.4      1.7
29 dec       92.4      5.1     0.89      1.6
5 jan        96.3      1.8      1.3     0.57
12 jan         96      2.3      1.6     0.11
19 jan       91.4        5      1.5      2.1
26 jan       94.8      2.6      2.3     0.32
2 fev        87.2      7.9        4     0.86
9 fev        91.2      5.6      2.6     0.54
16 fev         90      6.8      2.5     0.65
23 fev       90.9      5.5      3.1     0.44
2 mar        92.5      4.5      1.9      1.1
9 mar        92.1      4.2        2      1.8
16 mar       91.2        5      2.1      1.7
23 mar       94.8      2.8      1.1      1.3
30 mar         92      4.8     0.99      2.3
6 avr        93.9      3.5      1.5      1.1
13 avr         95      3.1      1.1     0.71
20 avr       95.1      2.8      1.3     0.84
27 avr       95.6      2.7     0.83     0.94
4 mai        95.1      3.3     0.68     0.89
11 mai       92.3      5.1      1.7     0.95
17 mai       92.7      3.8      2.5        1