Business Bankruptcy Filings and Nonbusiness Bankruptcy Filings are defined by the Administrative Office of the U.S. Courts as follows: "Section 101 of the U.S. Bankruptcy Code defines consumer (nonbusiness) debt as that incurred by an individual primarily for a personal, family, or household purpose. If the debtor is a corporation or partnership, or if debt related to operation of a business predominates, the nature of the debt is business." Table F-2 U.S. Bankruptcy Courts―Business and Nonbusiness Bankruptcy Cases Filed, by Chapter of the Bankruptcy Code.
Total Bankruptcy Filings is the sum of business and nonbusiness filings; this number includes Chapter 7, Chapter 11, Chapter 12, and Chapter 13 bankruptcies. As the federal courts handle all bankruptcies, these totals comprise all bankruptcies filed in a state.
All data points after 2001 come from the spreadsheets available on the Administrative Office of the U.S. Courts website. Data points from 1980-2000 come from the historical data hosted by the American Bankruptcy Institute, which can be found here.