<p>I think have a class of 55 out of ~600. </p>
<p>So ~%10, when you consider those accepted that choose another school. </p>
<p>In reality, however, it is probably more competitive to get into than say Princeton and Harvard (which both have %10 acceptance rates) because a significant amount of people applying to those schools have no chance and are doing it simply to have no regrets. I think everyone applying to the JF program is probably serious and has done significant research to have found it.</p>