All Employees: Professional and Business Services: Business Support Services in Illinois was 20.01469 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Business Support Services in Illinois reached a record high of 33.30247 in October of 2001 and a record low of 19.19657 in October of 2023. 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 March of 2024.