iers with two-letter</li>
<li>
<code>iso3</code> - Officially assigned country code identifiers with three-letter</li>
<li>
<code>code3</code> - UN country code</li>
<li>
<code>combined_key</code> - Country and province (if applicable)</li>
<li>
<code>population</code> - Country or province population</li>
<li>
<code>continent_name</code> - Continent name</li>
<li>
<code>continent_code</code> - Continent code</li>
</ul>
</div>
<div class="section level3">
<h3 id="data-summary">Data summary<a class="anchor" 