With less than a week until the deadline to buy individual health insurance that begins Jan. 1, experts say sign-ups are on course to hit or exceed the Obama administration's projection of about 9 million enrollees in 2015. Several weeks into the second year of the Affordable Care Act's insurance exchanges, about 1.5 million people have enrolled in coverage, according to data from state and federal exchanges. As of Dec. 5, almost 1.4 million had enrolled through the federal insurance exchange, which serves 37 states, the Centers for Medicare & Medicaid Services reported Wednesday.