North American Clean Energy, Jan/Feb 2014, by Kenneth Boyce.
http://www.nacleanenergy.com/magazine/janfeb2014/index.html#p=18

"Wind power generation resources continue to grow in North America and around the world, now representing a significant proportion of new electrical power capacity. In cases of rapid development and deployment of energy infrastructure--such as what is happening with new wind power resources--standards become a critical foundation."