Bourbon whiskey bourbon and Tennessee whiskey together. According to the Distilled Spirits Council, 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. During 2009–14, the volume of the value segment increased by 12.1%, premium by 25.8%, high-end premium by 27.8%, and super-premium by 123.8%. Gross supplier revenues (including federal excise tax) for U.S. bourbon and Tennessee whiskey increased by 46.7% over the 2009–14 period, with the greatest growth coming from high-end products (18.7% growth for value, 33.6% for premium, 44.5% for high-end premium, and 137.2% for super-premium). In 2014, more
American whiskey to by combining the term "straight" with the term for the type of whiskey. For example, a rye whiskey that meets this definition is called a "straight rye whiskey". Unqualified "whiskey" without a grain type identification such as "bourbon", "rye", or "corn" must be distilled at less than 95% alcohol by volume (190 proof) from a fermented mash of grain in such a manner that the distillate possesses the taste, aroma, and characteristics generally attributed to whiskey. It must be stored in oak containers – charred new oak is not required – and bottled at no less than 40% alcohol