[2012-01-01T21:00:00.000-05:00]: NaN
[2012-01-02T01:00:00.000-05:00]: NaN
[2012-01-02T05:00:00.000-05:00]: 3
[2012-01-02T09:00:00.000-05:00]: 6
[2012-01-02T13:00:00.000-05:00]: 9
[2012-01-02T17:00:00.000-05:00]: 12