In 1996, Portuguese imports totaled US$34.1 billion and exports US$23.8 billion. Principal imports typically were mineral fuels, machinery and transportation equipment, and food and livestock. Principal exports included clothing, textile yarns and fabrics, and wood and paper products. Leading purchasers of exports were Germany, Spain, France, the United Kingdom, the Netherlands, the United States, Italy, Belgium, and Sweden; chief sources for imports were Spain, Germany, France, Italy, the United Kingdom, and the Netherlands. Foreign exchange revenue from tourism, amounting to US$2.4 billion in 1997, helped to compensate for the nation's chronic trade deficit . The World Fair Expo '98 in Lisbon considerably enhanced the country's profile in this respect.