During 2014, the three largest federal healthcare programs (Medicare, Medicaid, and CHIP) had improper payment rates ranging from 6.5% to 9.9%. From 2007 through 2010 (later data not available), the ten largest health insurance companies had median annual net profit margins ranging from 2.1% to 4.4%. Throughout this period, the highest profit margin made by any of these companies in any year was 7.3%, and the lowest was -1.1%.