age	smoking	breathing	count
<40	never	normal		577
<40	never	borderline	27
<40	never	abnormal	7
<40	former	normal		192
<40	former	borderline	20
<40	former	abnormal	3
<40	current	normal		682
<40	current	borderline	46
<40	current	abnormal	11
40-59	never	normal		164
40-59	never	borderline	4
40-59	never	abnormal	0
40-59	former	normal		145
40-59	former	borderline	15
40-59	former	abnormal	7
40-59	current	normal		245
40-59	current	borderline	47
40-59	current	abnormal	27