Colon Polyp stats?

From another thread: just had the dreaded “cleanout / look-see” and they found one benign polyp, and one small sessile “tubular adenoma” which I gather was benign at this point but the doc described it as “precancerous”. All gone now, I get to repeat the process in a year then hopefully not for another 10.

Anyway - I’m googling to try to find any figures for percentages of the different types of polyps that ultimately do go bad (especially if broken down by sessile vs. pedunculated). Not having any good luck - does anyone else have links that might provide this sort of info?

Strictly for informational purposes, I’m doing whatever the Nice Doctor says re followup (if anything I might want to use the stats to ask him to be more aggressive re repeat procedures).

Funny aside: my brother wishes I hadn’t emailed him the day after the procedure. He was just prepping for his first one (he’s older so Bad Boy for waiting). I wanted to know if our parents had ever had such issues and he didn’t think so but he’d told his doc he had no family history. I told him “sorry, you do now!”. So now he gets to repeat in 7 years vs 10.