19,600. I'm willing to accept this, although I'm not going to lie -- I'm very upset at myself. I'm used to scoring 99th percentile in every standardized test; it's kind of a shock to realize that I'm nowhere near the median of even
my age group, let alone the general populace (I'm 20).
That said, I'm currently reading A Dance with Dragons and there are tons of words in this series (A Song of Ice and Fire) that I'm not familiar with. Most of the ones I missed are words I recognize from this series, although since I'm not 100% sure of them, so I left them unchecked.