More than a third of Louisiana residents were uninsured at some point between the start of 2007 and the end of 2008, according to a new national study. Families USA, a Washington, DC, nonprofit organization, found that 36.2% of the state's residents younger than 65 went without insurance for at least a month. A Louisiana Department of Health and Hospitals spokeswoman said 21.2% of the state's adult population lacked insurance in 2008. The state maintains that 95% of dependent minors are covered.