A basic tree visualization of dataset with its columns. The first node represents year. The children of year are total, male, female. Total's child is age group. Age group's children are 0-18, 19-44, 45-64, 65-84, 85 and total. Each of the age group has two children Out of pocket and private health insurance. Out of pocket's children are hospital care, dental service, prescription drug, and physician and clinical services. Private health insurance children are hospital care, dental service, prescription drug, and physician and clinical services.
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