Chatbot KPIs and benchmarks

Hi everyone. I can find a bunch of references online telling me what KPIs I should measure for my chatbot, and they have all been helpful; but does anyone know where I can find benchmarks? I understand that for a lot of these, I’ll be looking for trends, but are there any standards out there that I should be aiming for? I am looking at the following KPIs:
– Confusion Rate
– Missed Utterances
– Interaction Rate
– Retention Rate
– Goal Completion Rate
– Human Takeover Rate
– Total Number of Users
Thanks.