los nombres de las columnas:
[1] - go.mail.ru/search
[2] - yandex.ru/yandsearch
[3] - google.ru/search
[4] - Otros
Fecha         [1]      [2]      [3]      [4]
nov 22       32.6     32.4     33.7      1.3
dic 22       31.6     35.2     30.1      3.1
en 23        28.9       35     33.7      2.4
feb 23       28.6     36.6     33.1      1.7
mar 23       32.6       31     33.9      2.4
abr 23       35.5     31.9     29.6        3
mayo 23        32     30.3     35.4      2.3
jun 23       35.5     32.4     31.4     0.82
jul 23       32.5       27     30.5      9.9
ag 23        36.9     32.5     29.2      1.4
sept 23      32.8     32.4       32      2.9
oct 23       28.6     33.6     35.1      2.7
nov 23         34     33.5     29.2      3.2
dic 23       33.9     30.2     33.1      2.8
en 24        28.4       35     32.9      3.7
feb 24       28.7     34.3     28.4      8.6
mar 24       32.8     31.8     35.2     0.25
abr 24       28.4     37.3     32.6      1.7
mayo 24      34.7     30.4     33.8     0.91
jun 24       13.7       14     13.5     42.8
jul 24       20.9     22.9     17.1     28.7
ag 24        35.4     33.2     26.8      2.2
sept 24      31.8     27.9     29.5      6.6
oct 24       29.1     32.5     29.5      5.4
nov 24       26.9     30.2     28.1      7.9
dic 24       27.6     28.2     24.3      9.6
en 25        28.1     28.8     27.9     0.96
feb 25        5.2      4.6        5      7.5
mar 25       21.3     20.2     27.4      0.9
abr 25       23.9     22.5     25.8        0
mayo 25      35.7     28.6       31        0