The suggestion comes as the fire department, which is responsible for responding to medical emergencies, has seen a steady uptick in the number of calls — responding to 1.5 million in 2017, up 36% since 2000. At the same time, the number of fires in the city has decreased. But while EMS work makes up 84% of the department’s workload, it accounts for just 30% of its budget, the report’s author, Mariana Alexander, a research associate at the Citizens Budget Commission, said.