"<p>Figure 1. Top left: Male and female histograms showing the number of papers binned by elapsed time, <span data-node-type=""math-inline"" data-value=""\Delta""><span><span class=""katex""><span class=""katex-mathml""><math><semantics><mrow><mi mathvariant=""normal"">Δ</mi></mrow><annotation encoding=""application/x-tex"">\Delta</annotation></semantics></math></span><span class=""katex-html"" aria-hidden=""true""><span class=""base""><span class=""strut"" style=""height:0.68333em;vertical-align:0em;""></span><span class=""mord"">Δ</span></span></span></span></span></span>t, in the year 1998.</p><p>Top right: Normalized histograms used to compare overall shape of female and male histograms. Bottom left: Line plots depicting the histograms in the top left of the figure. Bottom right: Line plots depicting the normalized histograms in the top right of the figure.</p>"