Source: U.S. Census Bureau
Release: Business Formation Statistics
The core business applications series that correspond to a subset of all applications for an Employer Identification Number (EIN). Includes all applications for an EIN, except for applications for tax liens, estates, trusts, or certain financial filings, applications outside of 50 states and DC or with no state‐county geocodes, applications with a NAICS sector code of 11 (agriculture, forestry, fishing and hunting) or 92 (public administration), and applications in certain industries (e.g. private households, civic and social organizations).
U.S. Census Bureau, Business Applications for Illinois [BUSAPPNSAIL], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/BUSAPPNSAIL, January 20, 2021.