Sharon Stern: Health insurance coverage is an important measure of our nation's overall wellbeing. Whether it's illness, injury, or preventative needs, health insurance provides greater access to medical care, protection from high unexpected costs, and more economic stability. Each year, the Census Bureau provides data on health insurance coverage. We look at who is and isn't covered, where they live, and what type of insurance they have. Policymakers use this information to make data driven decisions.