[[1521687600, 1]
,[1521694800, 2]
,[1521698400, 1]
,[1521702000, 1]
,[1521712800, 3]
,[1521716400, 3]
,[1521720000, 4]
,[1521723600, 3]
,[1521730800, 1]
,[1521734400, 3]
,[1521738000, 7]
,[1521741600, 2]
,[1521745200, 1]
,[1521748800, 4]
,[1521752400, 3]
,[1521756000, 1]
,[1521759600, 1]