Wind power capacity and production: penetration by country

A 2008 study released by the U.S. Department of Energy noted that the capacity factor of new wind installations was increasing as the technology improves, and projected further improvements for future capacity factors.[73] In 2010, the department estimated the capacity factor of new wind turbines in 2010 to be 45%.[74] The annual average capacity factor for wind generation in the US has varied between 29.8% and 34.0% during the period 2010–2015.[75]

Reference 1: Penetration.

Reference 2: Denmark (2015)[14][15], Portugal (2013)[76][77], Spain (2011)[78], Ireland (2012)[79], United Kingdom (2015)[80], Germany (2011)[81] and United States (2013)[82].

Source: http://en.wikipedia.org/wiki/Wind_power