Annual unadjusted flow from BEA, NIPA, Table 1.13. Series is calculated as the sum of line 44, Households, Wage and salary accruals and line 51, Nonprofit institutions serving households, Wage and salary accruals. Quarterly unadjusted flow based on unpublished detail provided by BEA. Data for the most recent ten years show no significant seasonality. Series has no levels.