All Employees: Professional and Business Services: Computer Systems Design and Related Services in Illinois was 88.27597 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Computer Systems Design and Related Services in Illinois reached a record high of 93.42602 in September of 2022 and a record low of 23.50270 in September of 1992. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Computer Systems Design and Related Services in Illinois - last updated from the United States Federal Reserve on March of 2024.