The value returned with the SQL is now actually less than the "ideal" number, as some miners have thrown away block reward BTC. I might make a /q page for it eventually, as the difference is interesting.
Abe now supports totalbc but reports the measured number (e.g., 7017349.98999999) rather than the "ideal" value BBE gives. I do not plan to implement
totalbc for future blocks.
http://abe.john-edwin-tobey.org/chain/Bitcoin/q/totalbc