I agree with Alexey. See
http://www.marketingrockstarguides.com/b2b-marketing-benchmark-studies-1731/
Generally, Under .50% unsub is ideal over time and per email. Ideally you manage this down to .20% or less, culling your database to the point where you only have the most engaged people and have the most targeted emails. This is a process and takes awhile.
Abuse=0% at all times!!
Opens: 13-20% is normal
Delivery= 83-95% is normal, but you should aim for 95%+ as less than 90% is not good and under 80 is very bad.
CTR: depends, but it can be from .5% to 2% or as high as 15%+ depending on the email, audience, CTA, etc.