The mid 1600s and the early 1700s were Sweden's most successful years as a great power. A military power during the 17th century, Sweden has not participated in any war in almost two centuries. Aided by peace and neutrality for the whole of the 20th century, Sweden has achieved an enviable standard of living under a mixed system of high-tech capitalism and extensive welfare benefits. It has a modern distribution system, excellent internal and external communications, and a skilled labor force. Timber, hydropower, and iron ore constitute the resource base of an economy heavily oriented toward foreign trade. Privately owned firms account for about 90% of industrial output, of which the engineering sector accounts for 50% of output and exports. Agriculture accounts for only 1% of GDP and 2% of employment. The government's commitment to fiscal discipline resulted in a substantial budgetary surplus in 2001, which was cut by more than half in 2002 due to the global economic slowdown, declining revenue, and increased spending. The Swedish central bank (the Riksbank) focuses on price stability with its inflation target of 2%. Growth remained sluggish in 2003 but picked up during 2004-06. In September 2003, Swedish voters turned down entry into the euro system concerned about the impact on the economy and sovereignty.