The number of women who sought and won election to US Congress in each election cycle from 1974 to 2018. Data source: <a rel="nofollow" class="external text" href="http://www.cawp.rutgers.edu/sites/default/files/resources/canwincong_histsum.pdf">Women candidates for Congress 1974 - 2018</a>. <a href="https://en.wikipedia.org/wiki/Center_for_American_Women_and_Politics" class="extiw" title="w:Center for American Women and Politics">Center for American Women and Politics</a>. Add up House and Senate columns to get totals. Party and seat summary for major party nominees.
fivethirtyeight.com - and chart was cropped (with freeware <a href="https://en.wikipedia.org/wiki/IrfanView" class="extiw" title="w:IrfanView">IrfanView</a>) to remove original top and bottom text. New text added to top. See <a href="//commons.wikimedia.org/wiki/Commons_talk:Threshold_of_originality#Does_this_chart_pass_the_threshold_of_originality?" title="Commons talk:Threshold of originality">discussion</a>.
<a rel="nofollow" class="external text" href="https://fivethirtyeight.com/features/the-2018-midterms-in-4-charts">The 2018 Midterms, In 4 Charts</a>. <i><a href="https://en.wikipedia.org/wiki/FiveThirtyEight" class="extiw" title="w:FiveThirtyEight">FiveThirtyEight</a>.</i> By Rachael Dottle, Ella Koeze and Julia Wolfe. Nov. 13, 2018.