All Employees: Professional and Business Services: Other Professional, Scientific, and Technical Services in Illinois was 36.31202 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services: Other Professional, Scientific, and Technical Services in Illinois reached a record high of 40.19519 in September of 2023 and a record low of 16.00323 in December of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services: Other Professional, Scientific, and Technical Services in Illinois - last updated from the United States Federal Reserve on March of 2024.