ROCHESTER, N.Y.--(BUSINESS WIRE)--On September 29, 2015, the Paychex | IHS Small Business Jobs Index (SBJI) will expand its report on the state of small business employment growth by including more data and analysis on hiring trends across the United States and industry sectors. “Paychex pays one out of every 15 American private-sector employees, providing the opportunity to use real payroll data to gain insight into one of the main drivers of the U.S. economy – small businesses. Unlike other i