Throughput      data/hour    data/day       data/month    data/year
-------------   ----------   ------------   ------------  ------------
128 Kbit/sec    57 MByte     1.4 GByte      41.5 GByte    505.6 GByte
1 Mbit/sec      450 MByte    10.8 GByte     324 GByte     3.8 TByte
20 Mbit/sec     9 Gbyte      100.8 GByte    6.48 TByte    78.8 TByte
1 Gbit/sec      450 GByte    10.8 TByte     324 TByte     3.94 PByte
40 Gbit/sec     18 TByte     432 TByte      13 PByte      158 PByte
1 Tbit/sec      360 TByte    10.8 PByte     324 PByte     3.94 EByte

200 GByte a month is about 610 Kbit/sec ("kbps") continuous.
24 TByte a month is about 74 MBit/sec continuous.

Networks must be provisioned for "peak use" periods, which likely correlate for
users in the same region, so enforcing or charging for total throughput doesn't
seem to make much sense?