Please provide your proof of this statement

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...