 <translate> To answer this question, we should know that: Since that designation, Duke has won two additional national titles in 2010 and 2015.
So, the final answer is 2015. <yor> Láti dáhùn ìbéèrè yìí, a gbọ́dọ̀ mọ̀ pé: Láti ìgbà tí wọ́n ti yan Duke, ó ti gba àmì ẹ̀yẹ orílẹ̀-èdè méjì míràn lọ́dún 2010 àti 2015. Nítorí náà, ìdáhùn tó gbẹ̀yìn ni ọdún 2015. 