Another major employer is the health sector, which employs over 18,000 people. Four active general hospitals are in the Ottawa area: Queensway Carleton Hospital, The Ottawa Hospital, Montfort Hospital, and Children's Hospital of Eastern Ontario. Several specialized hospital facilities are also present, such as the University of Ottawa Heart Institute and the Royal Ottawa Mental Health Centre. Nordion, i-Stat and the National Research Council of Canada and OHRI are part of the growing life science sector. Business, finance, administration, and sales and service rank high among types of occupations. Approximately ten percent of Ottawa's GDP is derived from finance, insurance and real estate whereas employment in goods-producing industries is only half the national average. The City of Ottawa is the second largest employer with over 15,000 employees.