State's jobless rate falls below 4 percent.

Byline: David Sedore

Jul. 23--Florida's already shallow pool of available workers is drying up rapidly -- a boon to job seekers, but a migraine for those doing the hiring -- according to a state report released Friday.

The statewide unemployment rate, which was 4.1 percent in May, fell last month to 3.9 percent, the lowest point in 4 1/2 years, according to the Florida Agency for Workforce Innovation. In Palm Beach County and the Treasure Coast, unemployment rates rose sharply because of seasonal factors, including the end of the school year, but mirrored the state's robust job growth.

Economists and government officials said Florida's economy, …