Estonia–Latvia relations members of the Baltic Free Trade Area from 1994 until 2004 after which they joined the European Union. In 2006, Latvia accounted for 3% of Estonian exports. Latvia accounted for 5% of Estonian imports. There are 15 bilateral agreements between the 2 countries many of them signed trilaterally with Lithuania. The three Baltic countries signed a trilateral defence agreement on 12 February 1995. Estonia–Latvia relations Estonia and Latvia, the two northernmost Baltic states, share 343 km of common borders. Both states share a long common history, having since the 13th century been ruled by the Livonian Order, Poland-Lithuania, Sweden and
Oil shale in Estonia increasing the use of other energy sources such as renewable energy and natural gas. In 2016, 73% of oil shale mined in Estonia was used for power generation, and about 90% of Estonia's electricity was generated from oil shale. About 15% of produced electricity was exported to Finland and Latvia. Eesti Energia owns the largest oil shale-fuelled power stations (Narva Power Stations) in the world. In addition, a new 300 MW station, which will use circulating fluidised bed boiler technology, is under construction in Auvere. In 2010, 11.4% of the heat supply in Estonia was generated by direct combustion of