[[1520467200, 1]
,[1520470800, 1]
,[1520474400, 1]
,[1520478000, 1]
,[1520492400, 3]
,[1520496000, 3]
,[1520499600, 2]
,[1520503200, 1]
,[1520514000, 1]
,[1520517600, 3]
,[1520521200, 4]
,[1520524800, 3]
,[1520528400, 1]
,[1520535600, 2]
,[1520542800, 3]
,[1520546400, 1]