The index was most affected by rising prices in the manufacture of food products, electrical equipment, and industrial machinery and equipment, the office said.

Falling prices in electricity and heat energy production and in the manufacture of fuel oils and wood had the opposite effect on the index, it added.

Manufacturing prices alone grew 2.6% in May, and the price index for food industry was 9.6% higher compared to last year.

On a monthly basis, producer prices fell 0.3% in May, after a decline of 0.7% in the prior month.