From the summary:
More than 22.8 million mothers with children under 18 are in the workforce, making up nearly 1 in 6 – or 15.5 percent – of all workers. The great majority of these mothers work full time. In 2015, 42 percent of mothers were sole or primary family breadwinners, while 22.4 percent of mothers were co-breadwinners, meaning families are increasingly relying on mothers’ earnings.
While women in the U.S. who work full time, year round are typically paid just 80 cents for every dollar paid to their male counterparts, the wage gap between mothers and fathers is even larger. Mothers working full time, year round outside the home are paid just 71 cents for every dollar paid to fathers, a gap that translates to a loss of $16,000 annually. The wage gap between mothers and fathers exists across education level, age, location, race, and occupation, and compromises families’ economic security….