Average Impression Drop From &num=100 Removal in GSC

Hey All,

I'm trying to get a gauge of the average impression drop that people have seen across the web in GSC since Google removed &num=100 data.
I'm trying to identify any negative BH CTR manipulation that might have been occurring.
I've seen 70% impression decline on some of my sites.

If anyone has seen an article aggregating a lot of data, please link it