_id	ano	mes	total
1	2017	1	4754
2	2017	2	6291
3	2017	3	6473
4	2017	4	5638
5	2017	5	7506
6	2017	6	6805
7	2017	7	4127
8	2017	8	4562
9	2017	9	5660
10	2017	10	5013
11	2017	11	5578
12	2017	12	4997