Pretty close; 20% to men, 15-16% for women
You then quite predictably dug up a citation about contemporary women, which my earlier post noted are post-feminist, post-liberation, post-birth control women. There is simply no comparison. As women have become more equal to men in society, their behavior has started to be more equal as well: women now have almost as many heart attacks as men, they drink as much as men, many earn as much or more, there are now more women in college than men, and finally, women screw around as much as men these days.
But I repeat: we were talking about our great-great-great-grandmothers. That was an entirely different story. History did not start yesterday. At one time, marriage truly was the gold standard for American women and men as well -- around 92% of Americans were married in times before WWII; and divorce was rare. It was that way in Christian Scotland, as well.