_id	year	month	country_from	city_to	count
1	2011	1	Vietnam	Incheon	11
2	2011	2	Vietnam	Incheon	58
3	2011	3	Vietnam	Incheon	18
4	2011	4	Vietnam	Incheon	97
5	2011	5	Vietnam	Incheon	50
6	2011	6	Vietnam	Incheon	21
7	2011	7	Vietnam	Incheon	35
8	2011	8	Vietnam	Incheon	41
9	2011	9	Vietnam	Incheon	44
10	2011	10	Vietnam	Incheon	24
11	2011	11	Vietnam	Incheon	34
12	2011	12	Vietnam	Incheon	52