_id	year	month	country_from	city_to	count
1	2015	1	Vietnam	Incheon	109
2	2015	2	Vietnam	Incheon	20
3	2015	3	Vietnam	Incheon	157
4	2015	4	Vietnam	Incheon	134
5	2015	5	Vietnam	Incheon	120
6	2015	6	Vietnam	Incheon	13
7	2015	7	Vietnam	Incheon	47
8	2015	8	Vietnam	Incheon	17
9	2015	9	Vietnam	Incheon	143
10	2015	10	Vietnam	Incheon	52
11	2015	11	Vietnam	Incheon	57
12	2015	12	Vietnam	Incheon	42