group	br	
1	20.8
1	4.1
1	30.0
1	24.7
1	13.8
2	7.5
2	7.5
2	11.9
2	4.5
2	3.1
2	8.0
2	4.7
2	28.1
2	10.3
2	10.0
2	5.1
2	2.2
3	9.2
3	2.0
3	2.5
3	6.1
3	7.5