_id	year	month	country_from	city_to	count
1	2015	1	Vietnam	Busan	58
2	2015	2	Vietnam	Busan	90
3	2015	3	Vietnam	Busan	101
4	2015	4	Vietnam	Busan	61
5	2015	5	Vietnam	Busan	128
6	2015	6	Vietnam	Busan	14
7	2015	7	Vietnam	Busan	36
8	2015	8	Vietnam	Busan	100
9	2015	9	Vietnam	Busan	143
10	2015	10	Vietnam	Busan	83
11	2015	11	Vietnam	Busan	55
12	2015	12	Vietnam	Busan	26