ConcentrationBefore	ConcentrationAfter
13	11
14.9	13.6
14	12.3
13.4	9.9
9.8	10.3
14.9	10.7
12	9.6
11.2	9.5
14.9	11.8
15	13.1
9.7	9.2
13.1	10
14.4	11.9
11.3	13.7
14.6	12.3
