--- two rows below --
2
2014-10-01	2
2014-10-02	1
--- zero rows below --
--- one row below --
1
2014-10-01	2
--- two rows below --
2
2014-10-01	2
2014-10-02	1
--- two rows below --
2
2014-10-01	2
2014-10-02	1
4
2014-10-01	2
2014-10-02	1
2015-01-01	4
2015-01-02	3
--- 2 * 3 rows below --
2
2014-10-01	2
2014-10-02	1
2014-10-01	2
2014-10-02	1
2014-10-01	2
2014-10-02	1
--- 4 * 3 rows below --
2014-10-01	2
2014-10-02	1
2015-01-01	4
2015-01-02	3
2014-10-01	2
2014-10-02	1
2015-01-01	4
2015-01-02	3
2014-10-01	2
2014-10-02	1
2015-01-01	4
2015-01-02	3
4
4
4