Whisky is probably the best known of Scotland's manufactured exports contributing around £800 million to the Scottish economy, supporting 41,000 jobs as well as adding £2 billion to the balance of trade making it one of the UK's top five manufacturing export earners. The Whisky industry also generates a substantial income for the government with around £1.6bn raised in duty each year. The principal whisky producing areas include Speyside and the island of Islay where there are 8 distilleries providing a major source of employment for the island. In many areas the whisky industry is closely related with tourism, with many distilleries also functioning as tourist attractions worth £30 million Gross Value Added to the industry each year.