China connected 50.26 gigawatts of wind-generated capacity to the nation’s largest electricity grid as of this year, the official Xinhua News Agency said, citing a statement from China State Grid Corp.

Growth in the on-grid wind power capacity was up 87 percent annually over the last six years, Xinhua reported, citing the larger of China’s two transmission operators. Grid-linked capacity will rise to 100 gigawatts by 2015 and 200 gigawatts by 2020, according to the report published yesterday.

China, the world’s largest emitter of greenhouse gases, plans to have at least 15 percent of its energy mix come from non-fossil fuels by 2020. Wind farms are the second-biggest contributor to renewable-energy capacity in the nation after hydropower dams.