Hmmm.. according to:
http://www2.pbs.org/wgbh/nova/transcripts/2503supersonic.html
there were only 16 Concordes ever built, despite some rather dodgy
techniques used to discredit the Soviet TU-144 and capture the SST market*.
(gunboat diplomacy may be common, but Mirage marketing?)
Of course, a charming lady I conversed with in 1re on a subsonic did tell me
that one must really fly the Concorde at least once. If there were enough
Baccarat players to ferry between HKG and LAS, maybe those estimates
wouldn't seem off by so many orders of magnitude.
-Dave
* Boeing having withdrawn after calculating that their design was capable of
transatlantic flight -- without the added weight of pax.