please help me in plot my curve in excel

hello every one
i want represent time
7:00 7:30 8:00 8:30 9:00 9:30 10:00 10:30 11:00 11:30 12:00 12:30 1:00 1:30 2:00 2:30 3:00 3:30 4:00 4:30
in x axis
and the value in y axis
52.2 174.1 407.8 636.1 1084.4 1394.3 1615 1882.4 2302.4 2787.1 3260.5 3632 3986.1 4391 4753.3 5225 5768.7 6581.4 6663.2 6881.8

but when i plot this the all values not represent in the curve
only the first ten values represent
please help me
the file is attached below