Question: In 2011, what percent of the UK's electricity was produced by gas?
About the article "United Kingdom", section "Energy".

Candidate passages:
Production of Czech electricity exceeds consumption by about 10 TWh per year, which are exported.
Nuclear power presently provides about 30 percent of the total power needs, its share is projected to increase to 40 percent.
In 2005, 65.4 percent of electricity was produced by steam and combustion power plants (mostly coal); 30 percent by nuclear plants; and 4.6 percent from renewable sources, including hydropower.
The largest Czech power resource is Temelín Nuclear Power Station, other nuclear power plant is in Dukovany.
The Czech Republic is reducing its dependence on highly polluting low-grade brown coal as a source of energy.
Natural gas is procured from Russian Gazprom, roughly three-fourths of domestic consumption and from Norwegian companies, which make up most of the remaining one-fourth.
Russian gas is imported via Ukraine (Druzhba pipeline), Norwegian gas is transported through Germany.
Gas consumption (approx.
100 TWh in 2003–2005) is almost double electricity consumption.
South Moravia has small oil and gas deposits. 
The Electricity Commission was a government department that oversaw the UK's electricity supply industry from 1919 [http://www3.oup.co.uk/tweceb/hdb/Volume_14/Issue_04/pdf/hgw001.pdf] until nationalisation in 1947.
It considered standardization of frequency, regulations for overhead lines, the relative efficiency of gas and electricity and cases of interconnection overseas. 
The Office of Gas and Electricity Markets (Ofgem), supporting the Gas and Electricity Markets Authority (GEMA), is the government regulator for the electricity and downstream natural gas markets in Great Britain.
It was formed by the merger of the Office of Electricity Regulation (OFFER) and Office of Gas Supply (Ofgas). 
Production industries.
Electricity, gas and water supply.
The Blue Book 2013 reports that this sector added gross value of £33,289 million to the UK economy in 2011.
The United Kingdom is expected to launch the building of new nuclear reactors to replace existing generators and to boost UK's energy reserves. 
The Gas and Fuel Corporation of Victoria was a government-owned monopoly supplier of household gas in Victoria, Australia.
In 1951, the Victorian government took over two of the three main gas utilities in Melbourne - the Metropolitan Gas Company and the Brighton Gas Company.
In 1971 the Corporation acquired the Geelong Gas Company, one of only two remaining private gas companies in Victoria at the time.
One of the first tasks of the Corporation was the construction of a centralised brown coal fuelled gasification plant at Morwell, to replace the number of smaller town gas producing gasworks scattered throughout Melbourne.
The plant opened in 1956 and used the German Lurgi process to produce gas that was transferred to Melbourne via a high pressure gas pipeline.
The production of Syngas started in the 1950s, which is a process that converted waste gases from oil refineries to a useful energy product.
In 1966, thirty percent of gas was being produced from residual oil, thirty percent from refinery gas and LPG, thirty percent from Lurgi gas, and less than ten percent by carbonization of black coal.
Natural gas was discovered in Bass Strait in 1965, and a conversion program took place over a 20 month period, ending in December 1970, which required converting around one million appliances to operate on natural gas.
In July 1997 the Gas and Fuel Corporation was disaggregated into three divisions: gas distributor and retail companies, a gas transmission company and an independent Market Operator, VENCorp.
The distribution, retail and transmission companies were subsequently privatised by the Kennett Government, along with the State Electricity Commission of Victoria, Victoria's main electricity utility.
The corporation's former headquarters, the Princes Gate Towers on Flinders Street, were then demolished to make way for the Federation Square development.