One in ten per year sounds about right for these sorts of jobs. I bet if you drilled down you'd find that approximately that same 10% of people is getting fire

One in ten per year sounds about right for these sorts of jobs. I bet if you drilled down you'd find that approximately that same 10% of people is getting fired from every other jobs too. There's always a minority that is screwing up fairly often. Combine that with rigid bigCo policies on timeliness, performance, etc and you can see how 10% per year get fired.