Several Olympic events for youth, like the European Youth Olympic Festival and the Australian Youth Olympic Festival have proven successful. The first concept of the Youth Olympic Games came from Austrian industrial manager Johann Rosenzopf in 1998, but the International Olympic Committee's response was negative. Jacques Rogge, IOC President, formally announced plans for the Youth Olympic Games in Guatemala, in 2007. In 2008 the IOC announced that Innsbruck, Austria would be the host of the inaugural Winter Youth Olympics in 2012. Over 70 countries and 1,000 athletes participated in the Youth Winter Olympics, in 7 sports. The games are held every four years, and the age limitation of the athletes is 14 to 18.