All Employees: Professional and Business Services: Business Support Services in Illinois was 22.50000 Thous. of Persons in March of 2022, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Business Support Services in Illinois reached a record high of 32.90000 in November of 2001 and a record low of 20.00000 in February of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Business Support Services in Illinois - last updated from the United States Federal Reserve on April of 2024.