The number of unemployed workers with construction experience dropped to the lowest total for September since 2000, as hiring continued to slow despite robust demand for construction, according to an analysis by the Associated General Contractors of America. Association officials cautioned that the hiring slowdown most likely reflects a lack of available workers that could lead to project delays unless more students and workers join the construction sector.

“Growth in the construction workforce has been slowing throughout 2015, just at the time that construction spending has accelerated to a multi-year high,” said Ken Simonson, the association’s chief economist. “Contractors would love to hire more workers but there aren’t enough qualified craft workers or supervisors available.” Read full press release here.