Bulgaria's output of oil products fell to 379,000 tonnes in December, compared with 568,000 tonnes in the same month of 2019, the National Statistical Institute (NSI) said on Monday.
Electricity production declined by an annual 4.5% in the last month of 2020, to 3,888 GWh, the NSI said in a statement.
Deliveries of oil products also decreased in December - to 294,000 tonnes, from 335,000 tonnes a year earlier.
Electricity deliveries were flattish on an annual comparison basis at 3,378 GWh in the month under review.