This counter records the average bit rate of rate-limited traffic through the shaper during the archived historical interval. Comparing this historical average rate against the shaper's configured limit tells an admin whether the rate-limiting function was actively constraining traffic during that past period or whether traffic simply never reached the limit. For example, if a customer's speed complaint concerns yesterday evening, an admin would pull cmQosShaperHistoryABRRL for that interval to see if the shaper's rate limit was actually being hit.