Annual unadjusted flow from BEA NIPA. Series calculated as Table 7.11, line 25, Monetary interest received; plus line 49, Depositor and insurance services: Imputed interest received; plus line 89, Borrower services: Imputed interest received; less line 38, Monetary interest received: Rest of the world; less line 69, Imputed interest received: Rest of the world. Series is converted to quarterly by dividing the annual unadjusted flow by 4 and applying it to each four quarters. Data for the most recent ten years show no significant seasonality. Series has no levels.