In the 1940s, 80% of women were married by age 25.
Today, only about 12% are — and the trend points to a full reversal, where roughly 80% may never marry at all.
https://www.allendowney.com/blog/2024/12/11/young-americans-are-marrying-later-or-never/
Today, “never married” and “ever married” sit at roughly 50/50 for U.S. women ages 18–44 — in stark contrast to the late 1970s