_id	Field Name	Description
1	Airline Code	2-digit airline code 
2	Airline	Name
3	Destination Code	3-digit airport code
4	Destination	Name
5	Flights Dec 2017	Monthly flights current year
6	Seats Dec 2017	Monthly seats current year
7	Flights Dec 2016	Monthly flights previous year
8	Seats Dec 2016	Monthly seats previous year
9	Flights YOY Change	Current month minus previous month
10	Seats YOY Change	Current month minus previous month
11	Flights YOY Percent Change	Current month minus previous month
12	Seats YOY Percent Change	Current month minus previous month