As he stepped into the prime minister's job for the third time Wednesday, Nawaz Sharif vowed to improve Pakistan's limping economy, AP reported. His success in an office he was forced out of by a military coup in 1999 will hinge on how quickly he can address Pakistanis' most basic needs such as electricity and jobs, but many analysts believe his strong mandate at least gives him a fighting chance at success. Sharif was elected by parliament Wednesday after his party won the May 11 nationwide elections. He was sworn in hours later by Pakistani President Asif Ali Zardari. In a speech, Sharif vowed to address the country's myriad of problems. "I will do my best to change the fate of the people and Pakistan," he said. Sharif is the first Pakistani leader to serve three terms. He was elected prime minister in 1990 and then again in 1997, before returning to power in 2013.