The Conference Board’s U.S. employment trends index increased in June to a reading of 119.62, up from May’s upwardly revised reading of 119.03. The June reading is up 6.3 percent from the same month a year ago.

“The rapid increase in the Employment Trends Index in recent months suggests that strong job growth is likely to continue through the summer,” said Gad Levanon, director of macroeconomic research at The Conference Board. “While the strong labor market signals an improvement in economic growth, the key factor is that the average productivity of workers will need to rise as well.”