Task: Question Understanding
Input (English): Passage: However, later that month, due to the world financial crisis, the Russian Parliaments Defence Committee stated that the Russian defence budget would instead be slashed by 15 percent, from $40 billion to $34 billion, with further cuts to come. On 5 May 2009, First Deputy Prime Minister Sergei Ivanov said that the defence budget for 2009 will be 1.3 trillion rubles (US$39.4 billion). 322 billion rubles are allocated to purchase weapons, and the rest of the fund will be spent on construction, fuel storage and food supply. According to the head of the Defence Committee of the State Duma Vladimir Komoyedov, Russia plans to spend 101.15 billion rubles on nuclear weapons in 2013-2015. "The budget provisions under The Nuclear Weapons Complex section in 2013-2015 will amount to 29.28 billion rubles, 33.3 billion rubles and 38.57 billion rubles respectively," Komoyedov said, Vechernaya Moskva reports.
Question: Which year has the largest nuclear budget from 2013 to 2015?
Output (English): date