The USDA instituted the grading system in 1926, with the aim of supplying the consumer with a reliable indication of quality. There are eight government grades for beef: prime, choice, select, standard, commercial, utility, canner, and cutter. Steak aficionados seek out the top two, prime and choice (the latter of which represents more than half of all graded beef), which are streaked with plenty of intramuscular fat—a condition that makes them tender enough for dry-heat cooking methods like grilling, roasting, and broiling. Steaks that have been graded select—a variety primarily sold in supermarkets—are generally too lean to yield better than average results. The remaining grades designate meat that's sold wholesale, for use in a range of products, from frozen foods to hot dogs, though the majority of this wholesale-class meat isn't graded at all. The reason is that most meatpackers don't bother to seek grading for cuts they know won't receive prime or choice designations, which fetch the highest prices. This ungraded meat is often called "no roll"; the term refers to the absence of the USDA grade stamp, which is rolled onto the carcass.