They have quite a vast network of turbines. During some of the most windy days of the year, they produce more electricity than they consume. I'd say they also tend to do much less shipping by truck than many other countries.
Not sure where you got that from but 'sustainable energy' production (includes more than just wind, but safe to say that in our country is mostly wind) was only 3.9% in 2009. The government set a goal of 20% by 2020. So no, we are still mostly reliant on other forms of electricity.
