Annual unadjusted flow from BEA, NIPA . Series calculated as Table 1.12, line 9, Proprietors' income with IVA and CCAdj plus Table 7.9, line 2, Rental income of persons with capital consumption adjustment: Other private business. 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.