_id	BTS Delay reasons share	Air Carrier Delay	Aircraft Arriving Late	National Aviation System Delay	Security Delay	Extreme Weather	On time 15
8	2016	0.326	0.392	0.237	0.001	0.044000000000000004	0.8142
9	2017	0.312	0.39399999999999996	0.251	0.001	0.043	0.8018
10	2018	0.301	0.396	0.245	0.001	0.055999999999999994	0.7966
11	2019	0.306	0.397	0.24	0.001	0.055	0.7921
12	2020	0.41	0.302	0.21600000000000003	0.002	0.069	0.8463
13	2021	0.2652402099313686	0.21558336697618086	0.16633023819136053	0.3229713362939039	0.029874848607186113	0.8119
14	SOURCE: Bureau of Transportation Statistics (BTS)