The railway network in Great Britain has been used to transport goods of various types and in varying volumes since the early 19th century. Network Rail, which owns and maintains the network, aims to increase the amount of goods carried by rail. In 2015–16 Britain's railways moved 17.8 billion net tonne kilometres, a 20% fall compared to 2014–15. Coal accounted for 13.1% of goods transport in Britain, down considerably from previous years. There are no goods transported by railway in Northern Ireland.