All Employees: Professional and Business Services: Administrative and Support Services in Illinois was 421.00000 Thous. of Persons in March of 2022, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Administrative and Support Services in Illinois reached a record high of 441.60000 in November of 2018 and a record low of 204.90000 in February of 1991. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Administrative and Support Services in Illinois - last updated from the United States Federal Reserve on March of 2024.