Seasonally adjusted flow from BEA, NIPA, Table 1.7.5, line 2, Income receipts from the rest of the world. Prior to 2007, unadjusted flow from BEA, NIPA, Table 8.5, line 5, Interest receipts. Seasonal factors are calculated as the seasonally adjusted flow at an annual rate, divided by four, less the unadjusted quarterly flow. Series has no levels.