The first Border-Gavaskar Trophy series was played in India the 1996-97 Indian cricket season and was won by the hosts 1-0. Australia won the trophy for the first time in the 1999-2000 Indian cricket season at home where they defeated India 3-0. Since then, the trophy has alternated between both the teams. Australias failure to win the Border-Gavaskar Trophy in India led to Steve Waugh dubbing the Indian tour as the "Final Frontier" for the Australian team. In 2004-05, Australia defeated India 2-1 in India. Australias usual captain, Ricky Ponting, did not play in the winning matches due to injury and Adam Gilchrist instead captained the winning sides. In the 2008-09 edition, India defeated Australia 2-0 in a four match series in India to regain the trophy. In 2010 India retained the trophy by winning the two match series 2-0. Australia won the 2011-12 series 4-0, and regained the trophy for the first time since 2007-08. India returned the favour in the 2013 series by completing a 4-0 "Whitewash (sport)" of Australia to regain the trophy, before losing it in the 2014-15 series with a 2-0 defeat. India then won the 2017 series 2-1 and regained the trophy.
Question: How many games resulted in 4-0 wins?
Answer: 2