The proportion of 40-year-olds in the US who are not married is at an all-time high, according to a survey. As of 2021, 25 percent of those aged 40 had never been married. This figure was a significant increase from 20 percent in 2010. The percentage of Americans at age 40 who have never married has increased steadily since 1980. Only 6 percent of 40-year-old Americans were unmarried at that time. Pew Research Center...