Data          [1]      [2]      [3]      [4]      [5]
bal. 16      20.7     18.5      9.2      2.8      3.2
bal. 17      20.4     19.1      8.8        3      3.7
bal. 18        21     19.9      8.6      2.8      3.1
bal. 19      18.9     21.2      7.2      3.9      3.2
bal. 20      19.4     20.3        8      3.5      3.3
bal. 21      21.3     20.6      8.5      3.2      3.2
bal. 22      19.8     20.6      9.4      3.1      3.2
bal. 23      19.1     21.5        9        3      3.3
bal. 24      18.8       21      8.9      2.8      3.9
bal. 25      17.5     23.4      8.3      3.7      2.8
bal. 26      17.1     23.5      8.1      3.2      3.7
bal. 27      15.5     24.1      8.4      3.3      3.7
bal. 28      16.1     21.6      9.6      3.8      2.1
bal. 29      18.6       22      8.3      3.1      1.8
bal. 30      15.7       22      7.5      4.3      2.4
geg. 1         20     16.9        6        3      1.7
geg. 2       20.9     18.1      6.2      2.7      2.9
geg. 3       19.1     20.3      5.6      3.1      2.8
geg. 4         18     19.6      6.9      2.3      2.5
geg. 5       19.8     19.9        7      2.8      2.3
geg. 6       20.2     20.1      7.3      2.8      4.3
geg. 7       19.6       21      7.7      3.2      2.6
geg. 8       17.7       21      6.6      3.3      3.2
geg. 9       17.9     20.2      7.1      3.2      3.1
geg. 10      17.7     19.9      6.4      2.7      2.9
geg. 11      19.5     19.7      6.8      3.6        4
geg. 12      21.1     18.3        7      3.6      3.1
geg. 13      20.7     17.5      8.1      2.5      2.6
geg. 14      20.1     18.9        8      2.2      4.3
geg. 15      19.2     20.1      8.1      2.9      4.8
geg. 16      19.9     20.6      8.8      3.2      4.7
    viso      591      631      241     97.2     98.7