Taking place in 'rounds', these negotiations at first concentrated on lowering tariffs before moving on to additional issues such as subsidies, anti-dumping and non-tariff measures. The eighth trade round, called the Uruguay Round, ran from 1986-94 and was the most extensive of all, covering trade in goods, services, and intellectual property and establishing the WTO as a permanent organisation. GATT and the WTO have helped to create a strong and prosperous trading system contributing to unprecedented growth. The system was developed through a series of trade negotiations, or rounds, held under GATT. The first rounds dealt mainly with tariff reductions but later negotiations included other areas such as anti-dumping and non-tariff measures. The last round, the1986-94 Uruguay Round led to the WTO's creation. Some negotiations continued after the end of the Uruguay Round.