 data is available for each year from</span>
<span class="sd">    2009-2021 excluding the 2020-2021 school year.</span>

<span class="sd">    Returns</span>
<span class="sd">    -------</span>
<span class="sd">    DataFrame</span>
<span class="sd">        a pandas DataFrame holding school demographic data for all of the schools</span>
<span class="sd">        in the data portal</span>

<span class="sd">    &quot;&quot;&quot;</span>
    <span class="n">years</span> <span class="o">=</span><span class="p">[]<