Ground improvements were seldom, most clubs rarely reached their capacity on a regular basis, and poor facilities were commonplace – this particularly being the case between 1979 and 1986, when attendances fell, with this fall in spectators being blamed largely on increased hooliganism, as well as the economic downturn and sharp rise in unemployment that occurred in the early 1980s. The main source of income came from gate receipts, and most additional money was spent on transfers. It was not until the growing concern in the 1980s about the safety of existing stadiums, that clubs began to examine the possibilities offered by redeveloping their grounds. This was first highlighted in May 1985, when 56 fans were burnt to death in a fire at the Bradford City stadium, and even more so in the aftermath of the Hillsborough disaster of April 1989, which led to the death of 96 Liverpool fans at an FA Cup semi-final. Poor maintenance was seen as the main reason for the fire at Bradford, while the presence of perimeter fencing and standing areas (as well as loss of police control) were seen as the main factors in the Hillsborough tragedy.