More than 26,000 working-age adults die prematurely in the United States each year because they lack health insurance, according to a study published ahead of a landmark U.S. Supreme Court ruling on President Barack Obama's health care reform law. The study, released on Wednesday by the consumer advocacy group Families USA, estimates that a record high of 26,100 people aged 25 to 64 died for lack of health coverage in 2010, up from 20,350 in 2005 and 18,000 in 2000. That makes for a rate of about 72 deaths per day, or three per hour.