[[1519948800, 1] ,[1520294400, 1] ,[1520640000, 1] ,[1521158400, 1] ,[1521244800, 1] ,[1521331200, 2] ,[1521417600, 2] ,[1521676800, 1] ,[1521849600, 1] ,[1521936000, 3] ,[1522022400, 2] ,[1522195200, 2] ,[1522281600, 8] ,[1522368000, 2] ,[1522454400, 3]