alt='' width='700' height='433' /></div><div class='input'><span class='no'>us_ins_2018</span>$<span class='no'>prop</span> <span class='kw'>&lt;-</span> <span class='no'>us_ins_2018</span>$<span class='no'>percent</span>/<span class='fl'>100</span>
<span class='fu'>age_pyramid</span>(<span class='no'>us_ins_2018</span>,
  <span class='kw'>age_group</span> <span class='kw'>=</span> <span class='no'>age</span>,
  <span class='kw'>split_by</span> <span class='kw'>=</span> <span class='no'>gender</span>,
  <sp