The Seven Summits including Mount Kosciusko was first completed in 1985 by Dick Bass. At least 350 people have climbed all seven since then. There is some dispute over what constitutes Australia's summit: some people climb Mount Kosciuszko, the highest point on the Australian mainland; others climb the more demanding Puncak Jaya, highest point of the Australian continental shelf. In 1986, Canadian Patrick Morrow became the first to complete the Seven Summits with Puncak Jaya. In 1996, Californian David D. Keaton became the first person to complete both versions of the Seven Summits as well as the 50 U.S. state highpoints.