How many Oscars has Robert De Niro won?

How many Oscars has Robert De Niro won?
Robert De Niro has won two Academy Awards in seven nominations. Theroles and movies are as follows (Oscar wins in bold caps):
VITO CORLEONE in "THE GODFATHER PART II" (1974). BESTSUPPORTING ACTOR.Travis Bickle in "Taxi Driver" (1976). Best Actor.Michael "Mike" Vronsky in "The Deer Hunter" (1978). BestActor.JAKE LA MOTTA in "RAGING BULL" (1980). BEST ACTOR.Leonard Lowe in "Awakenings" (1990). Best Actor.Max Cady in "Cape Fear" (1991).Pat Solitano Sr. in "Silver Linings Playbook" (2012). BestSupporting Actor.