The FRED series Total Net Worth - Balance Sheet of Nonfarm Noncorporate Business is now known as Nonfinancial Noncorporate Business; Proprietors' Equity in Noncorporate Business (Net Worth).
The source series id is FL112090205.Q.
This series appears in Table B.104. For further information see the assistance provided in the guide to the Financial Accounts at http://www.federalreserve.gov/apps/fof/.
Board of Governors of the Federal Reserve System (US), Nonfinancial Noncorporate Business; Proprietors' Equity in Noncorporate Business (Net Worth), Level [TNWBSNNB], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/TNWBSNNB, March 23, 2018.