Year	% gross
1972	7.17294979095459
1973	6.46714019775391
1975	6.74793004989624
1976	6.91355991363525
1977	7.57397985458374
1978	7.91243982315063
1979	8.29751968383789
1980	9.78470039367676
1981	9.55231952667236
1982	10.2348804473877
1983	10.4315795898438
1984	10.8353395462036
1985	11.1104602813721
1986	11.4254503250122
1987	12.1062002182007
1988	12.0065002441406
1989	11.8351602554321
1990	12.2684898376465
1991	12.7442502975464
1993	12.9094696044922
1994	11.9830904006958
1995	18.2583694458008
1996	18.7761993408203
1999	29.215030670166
2000	26.0210094451904
2001	27.6238307952881
2002	27.0489196777344
2004	25.799840927124
2005	25.7679901123047
2006	27.8973197937012
2007	27.4719200134277
2008	29.909049987793
2009	31.0976696014404
2010	32.0197410583496
2011	33.1236190795898
2012	32.8087692260742
2013	35.7117195129395
2014	37.3273696899414
2015	37.7742881774902
2016	35.4017906188965
2017	36.721321105957
2018	37.5991897583008
2019	31.4434604644775
2021	35.7299995422363
2022	35.6580009460449