These sites claim the percentage of US web users using an ad blocker was 25% in 2016 and 27% in 2017: https://www.businessinsider.com/30-of-all-internet-users-

These sites claim the percentage of US web users using an ad blocker was 25% in 2016 and 27% in 2017: https://www.businessinsider.com/30-of-all-internet-users-will-ad-block-by-2018-2017-3 https://www.businessinsider.com/30-of-all-internet-users-wil... https://www.statista.com/topics/3201/ad-blocking/ https://www.statista.com/topics/3201/ad-blocking/