GROUP	AGE	CHANGE
1	31	17.05
1	23	4.96
1	27	10.4
1	28	11.05
1	22	0.26
1	24	2.51
2	23	-0.87
2	22	-10.74
2	22	-3.27
2	25	-1.97
2	27	7.5
2	20	-7.25