importation into the United States of whiskey designated as 'Bourbon Whiskey'." Federal regulation now defines bourbon whiskey to only include bourbon produced in the U.S. In recent years, bourbon and Tennessee whiskey, which is sometimes regarded as a different type of spirit but generally meets the legal requirements to be called bourbon, have enjoyed significant growth in popularity. The industry trade group Distilled Spirits Council of the United States (DISCUS) tracks sales of bourbon and Tennessee whiskey together. According to DISCUS, during 2009–2014, the volume of 9-liter cases of whiskey increased by 28.5% overall. Higher-end bourbon and whiskeys experienced the greatest growth. Gross supplier revenues (including federal excise tax) for U.S. bourbon and Tennessee whiskey increased by 46.7% over the 2009–2014 period, with the greatest growth coming from high-end products. In 2014, more than 19 million nine-liter cases of bourbon and Tennessee whiskey were sold in the U.S., generating almost $2.7 billion in wholesale distillery revenue. U.S. exports of bourbon whiskey surpassed $1 billion for the first time in 2013; distillers hailed the rise of a "golden age of Kentucky bourbon" and predicted further growth. In 2014, it was estimated that U.S. bourbon whiskey exports surpassed $1 billion, making up the majority of the U.S. total of $1.6 billion in spirits exports. Major export markets for U.S. spirits are, in descending order: Canada, the United Kingdom, Germany, Australia, and France. The largest percentage increases in U.S. exports were, in descending order: Brazil, the Dominican Republic, Bahamas, Israel, and United Arab Emirates. Key elements of growth in the markets showing the largest increases have been changes of law, trade agreements, and reductions of tariffs, as well as increased consumer demand for premium-category spirits. Legal requirements Bourbon's legal definition varies somewhat from country to country, but many trade agreements require that the name "bourbon" be reserved for products made in the U.S. The U.S. regulations for labeling and advertising bourbon apply only to products made for consumption within the U.S.; they do not apply to distilled spirits made for export. Canadian law requires products labeled bourbon to be made in the U.S. and also to conform to the requirements that apply within the U.S. The European Union also requires bourbon to be made in the U.S. following the law of the country. But in other countries, products labeled bourbon may not adhere to the same standards. The Federal Standards of Identity for