What is the success rate of NASA launches since it was founded in 1958? I'd appreciate a decade by decade statistic. By successful I mean a successful launch into space and release of payload (if any). It's irrelevant if the payload itself fails later.
Edit: IOW, the Challenger disaster should be considered a failure while Columbia, within this scope, should be considered a success as disaster struck only during re-entry. I'm only interested in official NASA launches into space. Sounding Rockets, ICBMs, etc. can be excused from this question.