<p>What happened at UNC between 2009-10 and 2010-11?</p>
<p>from the common data sets for each year:</p>
<p>Total Classes
2558 - year 2009
3107 - year 2010</p>
<p>2-9 students
229 (9.0%) – year 2009
722 (23.2%) - year 2010</p>
<p>10-19 students
766 (30.0%) - year 2009
945 (30.4%) - year 2010</p>
<p><20 students
995 (38.9%) – year 2009
1667 (53.7%) - year 2010</p>