títulos das colunas:
[1] - Google Chrome
[2] - Firefox
Data          [1]      [2]
Nov, 17      74.1        0
Nov, 24      87.5        0
Dez, 1       68.2     18.2
Dez, 8       83.3      8.3
Dez, 15      74.1     14.8
Dez, 22      73.3      6.7
Dez, 29        75     14.3
Jan, 5         75     12.5
Jan, 12      77.8     11.1
Jan, 19      97.4        0
Jan, 26      74.2      9.7
Fev, 2       95.5      1.5
Fev, 9       73.9      4.3
Fev, 16      61.1      5.6
Fev, 23      77.3        0
Mar, 2       65.2       13
Mar, 9       77.3     13.6
Mar, 16        70       10
Mar, 23      79.3      3.4
Mar, 30      91.9        0
Abr, 6       83.3        0
Abr, 13      79.3     10.3
Abr, 20      80.8      7.7
Abr, 27      73.7     10.5
Maio, 4      64.7     11.8
Maio, 11      76.5     17.6
Maio, 18      80.6      3.2
Maio, 25      78.3      6.5
Jun, 1       69.4      5.6
Jun, 8       73.3     13.3
Jun, 9        100        0