RankRanger, an SEO platform, reported yesterday via Twitter that their SERP features tracking tool has found that Google Answer related boxes, such as the knowledge cards and live results - not the featured snippets (more on the difference here) has reached to over 50% of the first page results on Google.
Of course, RankRanger does not track all queries Google sees, but from their sampling of what they track, which is obviously limited, it reached over 50%.
Here is their chart:
What are Knowledge Cards & Live Results?
Google is smarter every day and thus more confident in showing these answers at the top.
Forum discussion at Twitter.