Nearly 5 million children younger than three are in childcarethe care of someone other than their parentsan average of 25 hours each week. Of the 6.7 million children under age three with working mothers, 22 percent are in child care centers, 17 percent are in family child care settings, 7 percent are cared for by babysitters or nannies, 27 percent are in the care of relatives, and 27 percent are cared for by a parent. The report also looks at variation of childcare patterns by age of child, family income, race and ethnicity of the child, mother's level of education, family structure, and parent availability.