I mean continually asking questions about why things around them are happening, why the world works as it does, why nature works as it does etc…
Discussion
Not a lot, that’s for sure. Most people seem to enjoy small talk. 
In that case, I go for well under 20%. In my own circle, my tiny bubble, 3 of us ask these questions every day. Three out of ~120 people in my bubble. Most people don't care. They don't have the interest or the time. They choose safety over freedom. The security of a life in ignorance instead of a liberated life with responsibility.