Annual unadjusted flow from BEA NIPA. Series calculated as Table 7.11, line 25, Monetary interest received; plus line 54, Depositor and insurance services: Imputed interest received; plus line 95, Borrower services: Imputed interest received; less line 36, Monetary interest received: Rest of the world; less line 75, 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.