by the end of gw of wind power capacity had been installed worldwide figure ii of which gw were in eu gw in the united states gw in china and gw in india in gw of new capacity were installed which was per cent less capacity than in more than half of this new capacity was installed in china gw and india gw compared with gw in eu and gw in the united states eurobserver for several decades through its rd and its sunshine programme from to japan refined the technology and successfully reduced the costs of a kw roof system from million to million yen