<p>Thank you for this discussion. </p>
<p>We don’t have access to WUSTL’s CDS to see whether engineerbill’s idea is correct, but the CDS for UNC-CH shows that the percentage of their classes with 2 - 9 students for 2010-2011 was 23.2% (722/3,107), so it is certainly plausible. While this number is several percentage points off, we don’t know to which year the collegedata site refers. I think engineerbill is right.</p>