agricultural exports. More than half of the irrigated area was planted in corn, fruit trees, and vegetables. Other agricultural products that benefited from irrigation included grapes, cotton, sugar beets, potatoes, legumes, olive trees, mangos, strawberries, tomatoes, and fodder grasses. Depending on the nature of the crop, it was possible to harvest two successive crops in the same year on about 10% of the country's irrigated land. Citrus fruits, vegetables, cereal grains, olive oil, and wine—Spain's traditional agricultural products—continued to be important in the 1980s. In 1983 they represented 12%, 12%, 8%, 6%, and 4%, respectively, of the country's agricultural production. Because of the changed diet of an increasingly affluent population, there was a notable increase in the consumption of livestock, poultry, and dairy products. Meat production for domestic consumption became the single most important agricultural activity, accounting for 30% of all farm-related production in 1983. Increased attention to livestock was the reason that Spain became a net importer of grains. Ideal growing conditions, combined with proximity to important north European markets, made citrus fruits Spain's leading export. Fresh vegetables and fruits produced through intensive irrigation farming also became important export commodities, as did sunflower seed oil that was produced to compete with the more expensive olive oils in oversupply throughout the Mediterranean countries of the European Community. Tourism In 2017, Spain was the second most visited country in the world, recording 82 million tourists which marked the fifth consecutive year of record-beating numbers. The headquarters of the World Tourism Organization are located in Madrid. Spain's geographic location, popular coastlines, diverse landscapes, historical legacy, vibrant culture, and excellent infrastructure has made the country's international tourist industry among the largest in the world. In the last five decades, international tourism in Spain has grown to become the second largest in the world in terms of spending, worth approximately 40 billion Euros or about 5% of GDP in 2006. Castile and Leon is the Spanish leader in rural tourism linked to its environmental and architectural heritage. Energy In 2010 Spain became the solar power world leader when it overtook the United States with a massive power station plant called La Florida, near Alvarado, Badajoz. Spain is also Europe's main producer of wind energy. In 2010 its wind turbines generated 42,976 GWh, which accounted for 16.4% of all electrical energy produced in Spain. On 9 November 2010, wind energy reached an instantaneous historic peak