<div class="figure" style="text-align: center">
<img src="figures/contpop-1.png" alt="Country continents (represented by fill color) and 2015 populations (represented by circles, with area proportional to population)." width="576" />
<p class="caption">(\#fig:contpop)Country continents (represented by fill color) and 2015 populations (represented by circles, with area proportional to population).</p>
</div>