[[1520326800, 2]
,[1520330400, 3]
,[1520337600, 2]
,[1520341200, 1]
,[1520344800, 1]
,[1520348400, 1]
,[1520352000, 3]
,[1520355600, 1]
,[1520359200, 1]
,[1520362800, 2]