That is supposed to be the average. Among the really skilled it is probably more like 0.5%.
Some probably just do one dive, and then get by on the boasting rights, thereafter.
--
"It is the business of the future to be dangerous" - Hawkwind
Some probably just do one dive, and then get by on the boasting rights, thereafter.
--
"It is the business of the future to be dangerous" - Hawkwind