Source: US. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Employment Statistics (Establishment Survey).'
The source code is: CEU6000000016
US. Bureau of Labor Statistics, Indexes of Aggregate Weekly Hours of All Employees: Professional and Business Services [CEU6000000016], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CEU6000000016, July 25, 2016.