I took a look at the latest 10-Q financial statement filed by Aetna, one of the nation's largest private health insurers. Through June 30, Aetna took in $14 billion in premiums, $10.7 billion of that amount from employers and employees, $2.9 billion more from Medicare recipients who bought a supplemental insurance plan to cover the gap in what Medicare covers, and another $400 million for handling Medicaid claims. Aetna reports that it paid out $11.9 billion in health care reimbursements, and $2.3 billion in administrative expenses (20%).