Year	% gross
1972	107.527610778809
1973	89.5350723266602
1974	82.0439910888672
1975	93.8345718383789
1982	10.4739999771118
1984	10.8675298690796
1987	23.0753498077393
1999	46.7693099975586
2001	52.9141502380371
2002	57.0189514160156
2003	61.0308494567871
2004	62.9775085449219
2005	65.9380569458008
2006	66.5254592895508
2007	67.4165725708008
2008	68.9754028320313
2009	68.8904800415039
2010	68.4448699951172
2011	72.5004806518555
2012	70.4878463745117
2013	71.0278015136719
2014	71.4276504516602
2015	74.9831237792969
2016	75.7467880249023
2017	73.5408706665039
2018	73.2326965332031
2019	74.7021484375