Here is a website with stats on Human related deaths by large constrictors from 1990 to 2008.
http://www.rexano.org/Statistics/Constrictor_Captive_Snake_Fatality.pdf
No mention of any deaths from any sub species of Boa Constrictors or Anacondas.
They go on to state that the larger number of Burmese pythons related fatalities doesn’t mean that Burmese pythons are more dangerous than other large constricting snakes. More people likely keep and interact with captive Burmese pythons in the USA than with other large constrictors due to their populatiry and more laid back attitude than Rock's or Retic's.
CCR
