Changes in the calculation of the monthly average prices of liquid fuels in consumer price index
Statistics Finland receives weekly the prices of liquid fuels entered into the Tankille application provided by Energy Brokers Finland on the level of distribution stations. The weekly level price data contain multiple observations compared to the previous 60 distribution stations. The data collection covers the whole of Finland. Depending on the month, the data for the first three or four weeks of the month are received in time for the calculation of average prices because the data are published on the last weekday of the month.
The price data on light fuel oil are still collected from the web pages of the biggest operators. The collection of data on light fuel oil is carried out between the 10th and 20th days of the month. The price of light fuel oil is the price of summer quality for 2,000 litres delivered to the customer’s tank.
The average prices of liquid fuels are average prices for the whole country. The average price of petrol and diesel is the arithmetic mean weighted by sales shares between liquid fuel companies and the annual sales volumes of municipalities. The average price of light fuel oil is the arithmetic mean weighted by the annual sales volume of municipalities. The weights are updated annually.