The forecast in the bank’s May report revised upwards its previous projection of 3.4 percent Polish GDP growth this year.

But the bank warned that labour shortages could hit growth potential and said it expected the Polish economy to slow to 3.3 percent next year.

“GDP growth in 2018 is expected to remain strong, at 4.0 percent, before it slows down to 3.3 in 2019, as the supply problems and rapidly appreciating real exchange rate start to weigh on Poland’s competitiveness,” the report said.

“Unless addressed by policy-makers, labour shortages, which are exacerbated by low participation rates of the disabled and the elderly, will likely weigh on future growth potential,” the report added.