One in five children living in Texas is without health insurance—the highest in the nation, according to a report released by Families USA. The study, "Left Behind: Texas's Uninsured Children," found that 1.4 million children, or 20.5% of the population aged 18 and under were without health insurance in the three years from 2005 to 2007. The number of uninsured children in the state grew by more than 33,000 between 2003 and 2007, according to the study.