Children in poverty: 16.4 million, 22 percent of all children. Number of US children in low-income families (less than $44,700 for family of four): 31.9 million. Deep poverty (less than $11,157 for a family of four): 20.5 million people, 6.7 percent of population. Increase in deep poverty, 1976-2010: doubled—3.3 percent of population to 6.7 percent. Increase in number of Americans in poverty, 2006-2010: 27 percent. Increase in US population, 2006-2010: 3.3 percent. MORE by Greg Kaufmann, at Nation