Trigger Istio Circuit Breaker based on % of 5xxErrors

I was reading up the documentation for Istio circuit breaker here. I see that for a given interval we can set up a numerical value of consecutive5xxErrors (and check few other settings) for the circuit breaking action to take effect.

I wanted to know if it was possible to somehow do circuit breaking in Istio based on the % of 5xxerrors vs normal connections?