conc	group
3.300000000e+000	singly-housed
2.400000000e+000	singly-housed
2.500000000e+000	singly-housed
3.300000000e+000	singly-housed
2.400000000e+000	singly-housed
3.900000000e+000	group-housed
4.100000000e+000	group-housed
4.800000000e+000	group-housed
3.900000000e+000	group-housed
3.400000000e+000	group-housed