The other day I was talking about this to some friends, all of us are graduates and one (who I consider particularly intelligent) was shocked to find out that the majority of rocket launches are unmanned. She was further shocked to learn that astronauts haven't been to other planets and don't do so regularly.
When it comes to space especially it ceases to surprise me that the average person is uninformed, not just because of the education system and the understandable lack of interest in space but because the narrative of space travel in western culture is such that most people just assume we've been getting bigger and better since the moon landings. After all, we're clearly going to be living in space in the future...right??
An interesting blog post on this issue by a lecturer who raised this with his students
http://physics.ucsd.edu/do-the-math/2011/10/why-not-space/