Airbus Group NV reported a 15 percent gain in annual profit after increasing commercial plane deliveries and announced plans to boost monthly production of its workhorse A320 single-aisle aircraft to 50 a month by 2017. Earnings for 2014 before interest, tax and one-time items rose to 4.07 billion euros ($4.56 billion ) from 3.54 billion euros, beating estimates by analysts for 3.84 billion euros. The company took a charge of 551 million euros for penalties related to delays of its A400M military transport. Sales rose 5 percent to 60.7 billion euros.