What year were Basso and Ullrich excluded from Tour de France following Operación Puerto?

Explanation

Tour de France 2006 was hit by a major doping scandal, known as Operación Puerto, before the start of Tour. A Spanish doctor, Eufemiano Fuentes, was found to be systematically organising blood doping. Nine riders were excluded from the race, including the stars Jan Ullrich and Ivan Basso, who, until then, had been amongst the favourites to win that year's tour.