 This figure includes sales of the Prius α, launched in May 2011, and the Toyota Aqua, launched in December.Despite keeping to the top-selling spot, total Prius sales for 2011 were 20% lower than 2010 due partly to the disruptions caused by the March 2011 Tōhoku earthquake and tsunami, and also because government incentives for hybrid cars were scaled back.Nevertheless, during the 2011 Japanese fiscal year (April 1, 2011 through March 31, 2012), hybrid vehicles accounted for 16% of all new car sales in the country.