I don't think you can actually tell, can you? The views aren't individual people, they're individual views. You could just have a single stalker who viewed your thread 22,662 times!
Plus they aren't consistient. I've noticed the number of views stay the same after I went into a thread time to time.
I checked. Only my Klingon's eating habits thread came close to 2000 views. I don't know how many actual posters viewed it.