_id	year	month	country_from	city_to	count
1	2018	1	Vietnam	Incheon	42
2	2018	2	Vietnam	Incheon	10
3	2018	3	Vietnam	Incheon	21
4	2018	4	Vietnam	Incheon	58
5	2018	5	Vietnam	Incheon	40
6	2018	6	Vietnam	Incheon	53
7	2018	7	Vietnam	Incheon	53
8	2018	8	Vietnam	Incheon	14
9	2018	9	Vietnam	Incheon	72
10	2018	10	Vietnam	Incheon	36
11	2018	11	Vietnam	Incheon	49
12	2018	12	Vietnam	Incheon	60