Final answer:
In 2007, most personal health care spending was paid for by private health insurance, with Medicare and Medicaid also contributing significantly as government-funded health programs.
Step-by-step explanation:
In 2007, the majority of personal health care spending in the United States was paid for by private health insurance. The U.S. healthcare system is a mix of public and private healthcare services, with a significant portion of the funding coming from private health insurance plans, which are often provided through employers. A large segment of the population also receives health coverage through government-funded programs such as Medicare and Medicaid. Medicare is a single-payer system that serves the elderly, while Medicaid covers individuals with low incomes with joint federal and state funding. However, the question specifically inquires about 2007, and during that time, private health insurance was the largest source of healthcare spending.