_id	year	month	country_from	city_to	count
1	2017	1	Vietnam	Incheon	34
2	2017	2	Vietnam	Incheon	34
3	2017	3	Vietnam	Incheon	20
4	2017	4	Vietnam	Incheon	30
5	2017	5	Vietnam	Incheon	6
6	2017	6	Vietnam	Incheon	18
7	2017	7	Vietnam	Incheon	16
8	2017	8	Vietnam	Incheon	29
9	2017	9	Vietnam	Incheon	17
10	2017	10	Vietnam	Incheon	17
11	2017	11	Vietnam	Incheon	19
12	2017	12	Vietnam	Incheon	19