Teenage birth rates, as opposed to pregnancies, peaked in 1991, when there were 61.8 births per 1,000 teens, and the rate dropped in 17 of the 19 years that followed.[9] Three in ten American girls will get pregnant before age 20. That is almost 750,000 pregnancies a year.[10] Nearly 89% of teenage births occur outside of marriage.[3] Of all girls, 16% will be teen mothers.[11] The largest increases in unintended pregnancies were found among girls who were cohabiting, had lower education, and low income.[5]