Greenhouse gas emissions have declined by 8.7 per cent, on a National Accounts basis, since 1990. The main contributors of Greenhouse gas emissions are; the Electricity, Gas and water supply industry (25.4 per cent), Households (22.2 per cent) and Manufacturing (18.2 per cent). Energy consumption was 245.7 million tonnes of oil equivalent in 2004. This is 1.0 per cent higher than in 2003 and 11.4 per cent higher than in 1990. Environmental tax receipts in 2005 were £35.0 billion, 66.7 per cent of which came from taxes on hydrocarbon oils such as petrol and diesel.