5-18" aria-hidden="true" tabindex="-1"></a><span class="co">#&gt; 2 NA    y    </span></span>
<span id="cb5-19"><a href="#cb5-19" aria-hidden="true" tabindex="-1"></a><span class="co">#&gt; 3 NA    y    </span></span>
<span id="cb5-20"><a href="#cb5-20" aria-hidden="true" tabindex="-1"></a><span class="co">#&gt; 4 NA    y    </span></span>
<span id="cb5-21"><a href="#cb5-21" aria-hidden="true" tabindex="-1"></a><span class="co">#&gt; 5 NA    y    </span></span>
<span id="cb5-22"><a href="#cb5-22" aria-hidde