rCa2+

rMg2+

rNa+

rK+

rCl

r SO 4 2

HCO 3

1962/70

4.5

0.81

0.63

1

0.62

0.9

3.5

1993/95

1.38

1.25

0.76

1

0.77

1.4

1.38

1996/97

1.18

1

1

1

0.97

0.66

1.18

1997/98

1.31

1

0.86

1

0.87

1.12

1.27

2012/13

1.06

0.94

1

1

0.96

1.04

1.19

2013/14

1.20

0.97

0.92

1

0.88

1.10

1.29