Vietnam’s economy is expected to post annual growth of 6.55% this year, Prime Minister Nguyen Tan Dung said on Saturday, better than the 5.98% growth posted in 2014, VNA reported. Vietnam has projected growth of 6.5% to 7% a year in the 2016-2020 period, Dung told foreign donors and diplomats at an international conference in Hanoi, in line with a development roadmap drafted by the ruling Communist Party. “In the next five years, along with opportunities and favorable conditions, Vietnam will also face major challenges and difficulties,” he noted.