Since 1972, Eustream has secured the transmission of more than 2.2 trillion cubic meters of natural gas across the territory of the Slovak Republic. The company therefore successfully continues in the tradition of the Slovak gas industry, which dates back over 150 years. With the Russian-Ukrainian gas crisis in January 2009, European gas history has had to be rewritten and also Eustream, in close co-operation with adjacent network operators, is currently reviewing gas flow directions and cross-border capacities in order to enhance further the security of gas supplies to Europe. Eustream´s work is international gas transit. Expressed in numbers, 55.8 billion cubic metres of natural gas passed through the transmission system of Eustream in 2015, which converts in energy units to 591.13 terrawatt-hours. Most of the transmission, over 93 % was performed for international customers.