part of the County of Cleveland became part of North Yorkshire. Certain legal functions (such as policing) still exist under the old county names from before the 1996 reform, for example Cleveland Fire Brigade, as are the 1993-created regional boundaries. Economy of the county South and West The City of Leeds is Yorkshire's largest city and the leading centre of trade and commerce. Leeds is also one of the UK's larger financial centres. Leeds' traditional industries were mixed; service-based industries, textile manufacturing and coal mining being examples. Tourism is also significant and a growing sector in the city. In 2015, the value of tourism was in excess of £7 billion. Bradford, Halifax, Keighley and Huddersfield once were centres of wool milling. Areas such as Bradford, Dewsbury and Keighley have suffered a decline in their economy since. Sheffield once had heavy industries, such as coal mining and the steel industry. Since the decline of such industries Sheffield has attracted tertiary and administrative businesses including more retail trade; Meadowhall being an example. Coal mining was extremely active in the south of the county during the 19th century and for most of the 20th century, particularly around Barnsley and Wakefield. As late as the 1970s, the number of miners working in the area was still in six figures. The industry was placed under threat on 6 March 1984 when the National Coal Board announced the closure of 20 pits nationwide (some of them in South Yorkshire). By March 2004, a mere three coalpits remained open in the area. Three years later, the only remaining coal pit in the region was Maltby Colliery near Rotherham. Maltby Colliery closed in 2013. East Riding and North North Yorkshire has an established tourist industry, supported by the presence of two national parks (Yorkshire Dales National Park, North York Moors National Park), Harrogate, York and Scarborough. Tourism is a huge part of the economy of York with a value of over £765 million to the city and supporting 24,000 jobs in 2019. Harrogate draws numerous visitors because of its conference facilities. In 2016 such events alone attracted 300,000 visitors to Harrogate. Kingston upon Hull is Yorkshire's largest port and has a large manufacturing base, its fishing industry has however declined somewhat in recent years. Businesses in Hull are Aunt Bessie's, Birds Eye, Seven Seas, Fenner, Rank Organisation, William Jackson Food Group, Reckitt and Sons, KCOM Group and SGS