 <span class="fu">aes</span><span class="op">(</span>x <span class="op">=</span> <span class="va">year</span>, alluvium <span class="op">=</span> <span class="va">name</span>, y <span class="op">=</span> <span class="va">prop</span><span class="op">)</span><span class="op">)</span> <span class="op">+</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="geom_alluvium.html">geom_alluvium</a></span><span class="op">(</span><span class="fu">aes</span><span class="op">(</span>fill <span clas