A 2012 review by the National Institute for Early Education Research at Rutgers University identified Oklahoma, Georgia and West Virginia as among the leaders in public program quality and fraction of enrolled children. Florida had the highest enrollment in 2012 — almost four-fifths of all four-year-olds. About 84 percent were in private, religion-based or family centers. That state's preschool programs did not fare well on quality measures. Other states with more than 50 percent enrollment included Wisconsin, Iowa, Texas and Vermont.