Moving yearly Total Data / month

all values are listed as: M pkts

   time  |   bcast   bogey
---------+----------------
2021-08  |   9.348   0.008
2021-09  |   9.860   0.008
2021-10  |  10.496   0.008
2021-11  |  11.193   0.008
2021-12  |  11.700   0.008
2022-01  |  12.929   0.008
2022-02  |  13.164   0.008
2022-03  |  13.413   0.008
2022-04  |  13.786   0.007
2022-05  |  14.196   0.007
2022-06  |  14.581   0.006
2022-07  |  14.975   0.005
2022-08  |  14.362   0.005