Among adults in 2006, the number of uninsured increased by 1.4 million, bringing the adult total to 37 million. The uninsured rate increased from 19.8% to 20.4%. Adults experienced declines in employer-sponsored coverage at all income levels; the greatest declines were among those with low incomes. However, public coverage is limited for adults, even at low incomes. As a result, nearly half the growth in uninsured adults was among those with incomes below 200% of the poverty level. About 670,000 low-income adults joined the newly uninsured population in 2006. The number of uninsured middle-income adults increased by 340,000. Among adults with incomes above 400% of the poverty level, only small changes in employer-sponsored coverage were noted. However, because of large population increases in this income group, there was an increase of 370,000 adults without coverage.