The FRED series Savings Bonds - Assets - Balance Sheet of Households and Nonprofit Organizations is now known as Federal Government; U.S. Savings Bonds; Liability.
The source series id is FL313161400.Q.
This series no longer appears in Table B.101.
This data still updates, to see data for this series, go to https://fred.stlouisfed.org/series/FGSBLUQ027S.
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), Federal Government; U.S. Savings Securities; Liability (DISCONTINUED) [SBABSHNO], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/SBABSHNO, July 20, 2018.