y nationality</span></h2>
<table class="sortable wikitable">
<tr bgcolor="#EFEFEF">
<th>Nationality</th>
<th>Number of<br />
winners<sup id="cite_ref-mult_38-1" class="reference"><a href="#cite_note-mult-38"><span>[</span>nb 15<span>]</span></a></sup></th>
</tr>
<tr>
<td><span class="flagicon"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Flag_of_Argentina.svg/23px-Flag_of_Argentina.svg.png" width="23" height="14" class="thumbborder" srcset="//upload.wikimedia.org/wikipedia/commons/th