 After five years, 80.5 percent of graduates are still living and working in the region.The Texas Medical Center is the city's healthcare and biotechnology focal point with $3.5 billion committed to research grants from 2000 through 2004, more than 43 member institutions, 5.2 million patient visits in 2004.More than 65,000 health care professionals work there every day, treating more than five million patients from all over the world every year.