Yes, just do a google search. The latest most trustworthy report is ReturnPath's 2017 benchmark study.
Mailchimp and some others have some data.
I would be cautious in using this Benchmark data as it is often B2C based, directional, and probably not 100% accurate for your audience or list build methodology.
Thank you. Yes, I found a bunch of information online, including the MailChimp and ReturnPath's. I got some data directly from our agency as well, however none of it seems to really reflect Acquisition audiences (or it's at least not called out separately if it does). That's where I'm lacking info. I can find a ton on Customers though.