Since 2010:Q4, level from quarterly Reports of Condition for Corporate Credit Unions (form NCUA 5310), schedule A-3 Investments, U.S. Government and Government Guaranteed Obligations (CUCP0400). Prior to 2010:Q4, level from U.S. Central Credit Union Quarterly Financial Supplement, table Consolidated Fair Value Balance Sheet, Government Securities (at Carrying Value). Unadjusted flow is the change in the level; data for the most recent ten years show no significant seasonality.
