The share of electricity produced from renewable energy in Germany has increased from 6.3 percent of the national total in 2000 to over 25 percent in the first half of 2012.[1] Germany renewable power market grew from 0.8 million residential customers in 2006 to 4.9 million in 2012, or 12.5% of all private households in the country. In 2011, they purchased 15 terawatt-hours (TWh) of green power, and commercial customers bought a further 10.3 TWh.[2] Renewable energy share of gross electricity consumption rose from 10% in 2005 to 20% in 2011. Main renewable electricity sources were in first half of 2012: Wind energy 36.6%, biomass 22.5%, hydropower 14.7%, photovoltaics (solar) 21.2% and biowaste 3.6%.[3] Wood-fire plants fuelled by wood pellets are included in biomass.