According to the latest statistics released by the National Energy Administration, China, the world's largest wind power producer, saw its wind power output surge 41% YoY to 100.8 terawatt hours last year. The wind power output last year accounted for about 2% of the country's total on grid electricity. As of the end of last year, the country's on-grid wind power capacity had increased to 62.66 gigawatt hours, 14.82 GW or 31% more than a year ago. By the end of 2012, China had built 1,445 wind farms with 52,827 wind turbines throughout the mainland. The figure included about 1,000 state-owned wind farms, 150 privately owned wind farms.