_id	year	month	country_from	city_to	count
1	2021	1	Vietnam	Incheon	16
2	2021	2	Vietnam	Incheon	10
3	2021	3	Vietnam	Incheon	24
4	2021	4	Vietnam	Incheon	24
5	2021	5	Vietnam	Incheon	20
6	2021	6	Vietnam	Incheon	58
7	2021	7	Vietnam	Incheon	19
8	2021	8	Vietnam	Incheon	33
9	2021	9	Vietnam	Incheon	18
10	2021	10	Vietnam	Incheon	21
11	2021	11	Vietnam	Incheon	59
12	2021	12	Vietnam	Incheon	77