Speedway in Denmark is administrated by "Danmarks Motor Union (DMU)". The sport was introduced into Denmark in the 1930s but it didn't boom until the 1970s. Notable Danish speedway riders today include – Nicki Pedersen, Bjarne Pedersen and Hans Nørgaard Andersen. Former rider, Ole Olsen won the World Championship three times and his success helped popularise the sport in Denmark. Since retiring Olsen has become an FIM Speedway Grand Prix race director. A popular Danish rider in the 1960s was Arne Pander, and in the 1980s Erik Gundersen, Jan O Pedersen and Hans Nielsen (who was also an active racer through the 1990s).