airline	b2017	b2016	r2017	r2016
DELTA 679	912	0.07	0.09
VIRGIN	165	77	0.27	0.13
JETBLUE	1475	2140	0.54	0.82
UNITED	2067	2874	0.30	0.45
HAWAIIAN	92	30	0.11	0.04
EXPRESSJET	785	2541	0.67	1.58
SKYWEST	917	2177	0.37	0.96
AMERICAN	4517	6598	0.46	0.66
ALASKA	658	734	0.35	0.41
SOUTHWEST	6678	11907	0.58	1.06
FRONTIER	540	688	0.45	0.63
SPIRIT	1502	1418	0.88	0.93