A report from the Guttmacher Institute found that the proportion of women between the ages of 15 and 44 without insurance dropped by 22 percent in the ACA’s first year. Between 2013 and 2014, the percentage decreased from 17.9 percent to 13.9 percent, according to the report, which was released on Tuesday. That was largely a result of increased Medicaid coverage under the act, which saw a 17.4 percent increase among women of reproductive age.