Turkey is located on both Europe and Asia, bordering the Black Sea, Aegean Sea, and Mediterranean Sea. It has a population of over 75 million people and Istanbul is the most populated city, though the capital is Ankara. The official language is Turkish and Islam is the dominant religion. Tourism is a large industry and visitors have increased from 17.5 million in 2004 to over 23 million in 2007. The economy relies heavily on agriculture and exports precious stones, vehicles, and machinery. Establishing personal relationships is important in Turkish business culture and decisions are made slowly.