The length of the gas transmission network to the data for 2020, including the length of the gas distribution network with a pressure greater than 0.5 MPa. The number of consumers of gas from gas supply system (households) including persons using collective gas meters. In order to ensure data consistency, the percentage of the total population using water supply system, sewage system, or gas supply system was calculated using data originating from Census 2011. For the years 2020–2021 these indicators will be revised on the basis of data from Census 2021. Planned revision of data is scheduled for October 2023.