The producer price index (PPI) grew 19.2% year-on-year in September.

On a month-on-month basis, producer prices rose 2.8% in September.

"Compared to August, the index was mostly affected by price increases in electricity production and in the manufacture of wood products," Eveli Sokman, leading analyst at the statistics agency, said.

Import prices rose 2.3% monthly in September and gained 17.8% from a year ago. Export prices grew 1.8% monthly in September and increased 18.2% yearly.