I had a family friend who lived in Texas for a few years, and not once did he ever see a Texas Ranger.
I am not sure how many Jedi there are/were in the Star Wars galaxy, but when I think about how large a galaxy is, how many planets and moons must be inhabited, how many beings there must be spread throughout, and Han Solo's comments in Ep. IV (where he criticizes belief in the existence of the Force), it seems that the average citizen probably had no awareness of the Force.
The chances of even seeing a Jedi in one's lifetime must have been close to zero, and considering that they were the only ones who really used the Force, would the average galactic citizen even know about the Force (other than through rumor)?
(For the record, I'm only a "casual" Star Wars fan. I couldn't tell you where Chewbacca went to college or anything like that. I might need the "Star Wars 101" answer.)