Wisconsin doctors say an aging population means an increasing demand for medical care — at the same time the number of doctors is dropping.  An estimated 10-thousand baby boomers become eligible for Medicare every day.  At the same time, the nation’s doctors are aging, making recruitment tactics for young professionals even more important.  La Crosse-based Gunderson Health System says the number of medical students isn’t growing right now.  The country may be short more than 88-thousand doctors in less than a decade.