Estonia has a high-income, modern market economy with increasing ties to the West, including the pegging of its currency to the euro. It acceded to the European Union in 2004. There is a great degree of economic mobility and technological advancement. The state of the economy is greatly influenced by developments in Finland, Sweden, and Germany, three major trading partners. Key sectors of Estonan economy are Oil shale energy, telecommunications, textiles, chemical products, banking, services, food and fishing, timber, shipbuilding, electronics, and transportation.