Forty-four states and Washington, D.C., added construction jobs last year and overall construction employment levels increased in 39 states and Washington, D.C., in the last two months of 2015, a contractor group says.

The figures were released by the Associated General Contractors of America, using an analysis of Labor Department data released by the Associated General Contractors of America.

Officials said that many of the states experiencing construction declines appear to be energy producing states.

“Construction employment expanded in most parts of the country last year as demand for new projects rebounded,” said Stephen E. Sandherr, CEO of the association. “The question now is whether declining energy prices will impact construction employment in a larger part of the country this year.”

According to the AGC’s study, California added the most construction jobs between December 2014 and December 2015.

Other states adding a high number of new construction jobs for the past 12 months include Florida, New York and Colorado. Hawaii added the highest percentage of new construction jobs during the past year — 15.5 percent, followed by Iowa at 12.9 percent, Arkansas with 11 percent and Idaho, also at 11 percent.