Today, the majority of women in the United States work outside of the home. But that hasn't always been the case. In 1950, only 34% of women worked outside of the home, with presumably a good chunk of the remaining percentage dedicating their time to raising children. However, that percentage jumped to 60% by 2010. But despite women's increased participation in the labor force, they were still expected to take responsibility for most of the household chores and childcare. By the '70s, working women were blamed for the rising divorce rate -- their jobs contributed an added stress that marriages supposedly couldn't handle. A more recent study found that heterosexual married couples in which men do more household chores are less likely to divorce. The study showed that sharing housework may be key to a happier marriage.