The sport incorporates elements from a variety of other disciplines, including sambo, judo and traditional wrestling. Unlike Greco-Roman Wrestling, both men and women compete in Freestyle Wrestling at the Olympics. The sport is also contested at a wide variety of different weight levels including light flyweight, flyweight, bantamweight, featherweight, lightweight, welterweight, middleweight, light heavyweight, heavyweight and super heavyweight. Freestyle Wrestling has featured at the modern Olympics every year except for 1896 and 1912. The United States is by far the most successful nation – topping the medals table with a grand total of 110. The Soviet Union have amassed 56 medals, whilst Japan are in third position overall with 45.