Dear Carrie, I'm turning 65 next year and plan to work for a couple more years. Should I apply for Medicare even though I have coverage through my employer? --A ReaderDear Reader, This is an important question that affects a growing number of workers. In fact, data from the University of Michigan's Health and Retirement Study (2006 to 2010) sponsored by the National Institute on Aging shows some eye-popping trends. According to the study, 79.5 percent of respondents expect to work past age 65, with 65.2 percent expecting to retire by age 80 -- and 22.4 percent planning never to...