Numbers say it all. Globally, progress in the wind sector continues to be strong with increasing annual installed capacity and growing investment in the sector. In 2015 alone, 63,013 megawatts of wind power capacity was installed globally an annual market growth of 22 percent. It is continuing its progress towards becoming a mainstream, competitive and reliable power source in both developing and mature markets. In fact, wind is becoming cheap enough in many places in the U.S.