All Employees: Professional and Business Services: Other Support Services in Illinois was 19.34755 Thous. of Persons in March of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Other Support Services in Illinois reached a record high of 26.24059 in January of 1997 and a record low of 15.39992 in May of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Other Support Services in Illinois - last updated from the United States Federal Reserve on April of 2024.