An equal number of states lost and added construction jobs in September, according to analysis by the Associated General Contractors of America (AGC).

While construction employment expanded in 35 states and the District of Columbia between September 2014 and September 2015, only 23 states added jobs between August and September. Twenty-three lost jobs, and four broke even.

“Depending on the kind of work they perform, many contractors either can’t find enough workers, or they can’t find enough work,” says Stephen E. Sandherr, CEO of AGC. “While overall demand for construction continues to grow and sap the pool of available labor, firms that work on federally-funded projects are dealing with a lot of uncertainty.”

California added the most new construction jobs (43,900 jobs, 6.4 percent) over the year, followed by Florida (26,700 jobs, 6.6 percent), Washington (11,400 jobs, 7.1 percent) and Pennsylvania (11,300 jobs, 4.9 percent). Arkansas (16.1 percent, 7,400 jobs) added the highest percentage of jobs during the past year, followed by Alaska (11.2 percent, 1,900 jobs), Kansas (9.5 percent, 5,600 jobs) and South Carolina (9.0 percent, 7,400 jobs).

Fourteen states shed construction jobs during the past 12 months, with West Virginia (-16.9 percent, -5,800 jobs) losing the highest percentage. Other states that lost a high percentage of jobs for the year include Rhode Island (-10.9 percent, -1,800 jobs), Ohio (-6.3 percent, -12,400 jobs) and Mississippi (-5.1 percent, -2,400 jobs). The largest job losses occurred in Ohio, West Virginia, Minnesota (-2,700 jobs, -2.5 percent) and Mississippi.

Florida (3,200 jobs, 0.8 percent) added the most construction jobs between August and September, followed by Louisiana (3,100 jobs, 2.2 percent), New Jersey (2,800 jobs, 1.9 percent) and Texas (2,700 jobs, 0.4 percent). Alaska (3.9 percent, 700 jobs) added the highest percentage of jobs over the month, followed by New Mexico (3.2 percent, 1,300 jobs), South Dakota (2.6 percent, 600 jobs), Utah (2.5 percent, 2,000 jobs) and Louisiana.

Twenty-three states lost construction jobs in September. North Carolina (-3,300 jobs, -1.7 percent) shed the most, with Colorado (-2,200 jobs, -1.4 percent), Massachusetts (-2,000 jobs, -1.5 percent), New York (-1,800 jobs, -0.5 percent) and Oregon (-1,800 jobs, -2.2 percent) following. Montana (-4.4 percent, -1,100 jobs) lost the highest percentage of construction jobs between August and September, followed by Idaho (-2.5 percent, -1,000 jobs) and Oregon.