was £13.0 billion higher than in the financial year of 2012–2013. Taxation in the United Kingdom may involve payments to at least two different levels of government: local government and central government (HM Revenue & Customs). Local government is financed by grants from central government funds, business rates, council tax, and, increasingly, fees and charges such as those from on-street parking. Central government revenues are mainly from income tax, national insurance contributions, value added tax, corporation tax and fuel duty. Sectors Agriculture Agriculture in the UK is intensive, highly mechanised, and efficient by European standards. The country produces around 65% of its food needs. The self-sufficiency level was just under 50% in the 1950s, peaking at 80% in the 1980s, before declining to its present level at the turn of the 21st century. Agriculture added gross value of £12.18 billion to the economy in 2018, and around 392,000 people were employed in agriculture, hunting, forestry and fishing. It contributes around 0.6% of the UK's national GDP. Around two-thirds of production by value is devoted to livestock, and one-third to arable crops. The agri-food sector as a whole (agriculture and food manufacturing, wholsale, catering, and retail) was worth £120 billion and accounts for 4 million jobs in the UK. Construction The construction industry of the United Kingdom employed around 2.3 million people and contributed gross value of £123.2 billion to the economy in 2019. One of the largest construction projects in the UK in recent years was Crossrail, costing an estimated £19 billion. Due to start opening by Christmas 2021, it will be a new railway line running east to west through London and into the surrounding area, with a branch to Heathrow Airport. The main feature of the project is construction of 42 km (26 mi) of new tunnels connecting stations in central London. Ongoing construction projects include the High Speed 2 line between London and the West Midlands. Crossrail 2 is a proposed rail route in the South East of England. Production industries Electricity, gas and water This sector added gross value of £51.4 billion to the economy in 2018. The United Kingdom is expected to launch the building of new nuclear reactors to replace existing generators and to boost the UK's energy reserves. Manufacturing In the 1970s, manufacturing accounted for 25 percent of the economy. Total employment in manufacturing fell from 7.1 million in 1979 to 4.5 million