Data from your own users is the most useful, but here's some published data. There's plenty more to be found and of course methodology, quality and intention varies.

https://www.ncbi.nlm.nih.gov/books/NBK616185

https://www.aba.com/news-research/analysis-guides/preferred-...

https://www.iab.com/wp-content/uploads/2017/06/2017-IAB-Glob...