> encodes Spring 95–96</li>
<li>
<code>19954</code> encodes Summer 95–96 (first session)</li>
</ul>
<p>Different institutions supply data over different time spans.</p>
<div class="sourceCode" id="cb10"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="co"># Range of data by institution</span></span>
<span><span class="va">term</span><span class="op">[</span>, <span class="fu">.</span><span class="op">(</span>min_term <span class="op">=</span> <span class="fu"><a href="htt