Year-end level from financial statements compiled by and purchased from SNL Financial. Series from Schedule DA--Part 1, lines Subtotal--Exempt MMMFs and Subtotal--Class One MMMFs. Level for other quarters is the sum of Quarterly Statement, table Assets, a portion of line 5, Cash, cash equivalents, and short-term investments. Unadjusted flow is the change in the level; data for the most recent ten years show no significant seasonality.
