Moving monthly Total Data / day

all values are listed as: k pkts

      time  |    bcast    bogey
------------+------------------
2009-12-26  |  326.586    0.000
2009-12-27  |  327.107    0.000
2009-12-28  |  324.849    0.000
2009-12-29  |  318.608    0.000
2009-12-30  |  328.889    0.000
2009-12-31  |  323.644    0.000
2010-01-01  |  324.405    0.000
2010-01-02  |  329.992    0.000
2010-01-03  |  339.040    0.000
2010-01-04  |  344.854    0.000
2010-01-05  |  347.995    0.000
2010-01-06  |  350.771    0.000
2010-01-07  |  348.883    0.000
2010-01-08  |  348.200    0.000
2010-01-09  |  350.603    0.000
2010-01-10  |  346.552    0.000
2010-01-11  |  346.099    0.000
2010-01-12  |  344.855    0.000
2010-01-13  |  343.803    0.000
2010-01-14  |  345.136    0.000
2010-01-15  |  347.619    0.000
2010-01-16  |  353.218    0.000
2010-01-17  |  353.992    0.000
2010-01-18  |  356.887    0.000
2010-01-19  |  362.645    0.000
2010-01-20  |  384.975    0.000
2010-01-21  |  402.300    0.000
2010-01-22  |  418.887    0.000
2010-01-23  |  437.230    0.000
2010-01-24  |  454.001    0.000
2010-01-25  |  472.239    0.000
2010-01-26  |  488.477    0.000