What is the percentage Human survival rate of a space shuttle mission?

Answer 1

There have been so far a total of 119 space shuttle flights, with a total crew complement of 820, according to Wikipedia. Of those 119 missions 2 have resulted in the loss of crews, seven astronauts in each case, making a total of 14.

Crunch those numbers and you come up with a 98.3% success rate for shuttle flights, whether you do it based on number of flights or number of astronauts.

Answer 2

If we take all space related accidents into account the figure get even lower. Space work is still high risk, possibly higher risk than mining. But lower risk then infantry work in a war zone.