The diffusion index of coincident economic indicators, a key measure in assessing the current state of the economy, expanded in June for the 14th consecutive month, the Economic Planning Agency said in a preliminary report released Friday.

The index registered a preliminary 75 percent. A reading above 50 percent is believed to indicate an economic expansion, while a reading below that level is considered to indicate a contraction. The index registered 70 percent in May.

The diffusion index of leading indicators, which is considered to forecast activity several months ahead, rose above 50 percent for the first time in three months, to 56.3 percent.