Data          [1]      [2]      [3]      [4]      [5]
bal. 17      13.1     10.4      8.6      6.6      2.6
bal. 18      13.6     10.5      8.7      6.7      2.7
bal. 19      13.6     10.6      6.8        6      2.7
bal. 20      12.6     10.3      7.4        6      2.9
bal. 21      13.6     10.4      9.2      6.5      2.9
bal. 22        13     10.6      9.4      6.4      2.8
bal. 23      13.5     10.8      8.9      6.4      2.8
bal. 24      13.6     10.6      8.9      6.7      2.8
bal. 25      13.4     10.7      8.3      6.7      2.8
bal. 26      12.6      9.7      6.8        6        3
bal. 27      12.5      9.8      7.6      5.9      3.3
bal. 28      13.2     10.6      8.6      6.9      2.9
bal. 29      13.1     10.6      8.4      6.7      2.8
bal. 30      13.5     10.6      7.9      6.5        3
geg. 1       12.7     12.7      6.5      5.5      2.8
geg. 2       13.1       10        7      6.1        3
geg. 3       12.9       10      7.1        6      3.1
geg. 4       13.3     10.3      7.3      5.8      3.5
geg. 5       13.7     11.6        8      6.8      2.9
geg. 6       13.5     10.9      7.7      7.2      2.8
geg. 7       13.5       11      7.8        7        3
geg. 8       13.7     10.9      6.6      6.5      3.2
geg. 9       14.1     10.9      6.4      6.7      3.3
geg. 10       9.9     10.6      7.1      6.4      3.3
geg. 11       9.5     10.7      7.6      6.5      3.4
geg. 12       9.7     10.6      8.5      7.1      2.9
geg. 13       9.9     10.5        9        7        3
geg. 14       9.7       11      9.4      7.1      2.9
geg. 15       9.9     10.9      8.7        7      2.9
geg. 16       9.7       11      8.1        7      2.9
geg. 17       9.6     10.7      6.8      6.5      3.2
    viso      383      331      245      203     92.3