(Reuters) - The 33 car field for the Indianapolis 500 was set on Sunday with women drivers claiming three of the nine spots on offer on Bump Day. Brazil's Ana Beatriz and Britain's Pippa Mann and Katherine Legge joined Swiss Simona De Silvestro, who was among the 24 cars that qualified on Saturday for next Sunday's race. "I'm much happier than I was this time yesterday (Saturday)," said Mann, who failed to earn a spot on Pole Day at the famed Brickyard. "This was a nice, clean run. "We almost had four really nice clean laps... I'm happy right now, much less stressed than I was yesterday. ...