Diabetes-related mortality rates have reached an all-time high in New York City, with people of color hit the hardest, according to a report released this week by the New York City Department of Health and Mental Hygiene. Approximately one person dies of diabetes-related causes every 90 minutes in the city— a mortality rate that has nearly doubled in two decades, from 6 percent in 1990 to 10.8 percent in 2011, says the report.