Quick google search gave me that for 2018.
Didnt deep dive it.
https://www.google.com/amp/s/www.forbes.com/sites/bradadgate/2018/11/26/nfl-scoring-is-up-and-so-are-ratings/amp/
“most any football fan will tell you, watching NFL games in 2018 has been exciting. One reason is that scoring is on a record-setting pace. After 11 weeks, the NFL has been on a record pace for most points scored (7,791), most touchdown (895) and most passing touchdowns (570). On average, there are 48.4 points scored in a game”