Final answer:
In 2010, approximately 51 million Americans did not have health insurance. This included children, individuals with employers who did not provide health insurance, and those with income below the poverty line.
Step-by-step explanation:
According to the U.S. Census Bureau, in 2010, approximately 51 million Americans had no health insurance. This figure included approximately 9 million individuals under the age of 18 who were eligible for but not enrolled in Medicaid or the Children's Health Insurance Program. Some 28 million people came from households with income above the poverty line but whose employers did not provide them with health insurance, and about 15 million of the uninsured had income below the poverty line yet were not receiving Medicaid.