service_id,date,exception_type
w6,20160701,1
w3,20160701,2
w4,20160701,1
w6,20160801,1
w3,20160801,2
w4,20160801,1
w6,20160905,1
w3,20160905,2
w4,20160905,1
w4,20161010,1
w3,20161010,2
w4,20161111,1
w3,20161111,2
w4,20161225,1
w3,20161225,2
w4,20161226,1
w3,20161226,2
w6,20171009,1
w6,20171111,1
w6,20171225,1
w6,20171226,1
w6,20180101,1