Year	% gross
1971	29.3025302886963
1972	29.5550403594971
1973	30.291540145874
1974	33.0121803283691
1975	33.5089416503906
1976	32.8224296569824
1977	33.1421508789062
1978	32.0904006958008
1979	33.2378311157227
1980	33.9688186645508
1981	34.936939239502
1982	36.1419410705566
1983	38.232250213623
1984	39.6392784118652
1985	40.8125686645508
1986	42.2656402587891
1987	43.0108489990234
1988	44.0347709655762
1989	44.2049217224121
1990	44.9442405700684
1991	45.5606117248535
1992	45.8386192321777
1993	45.6138687133789
1994	46.656909942627
1995	47.8750495910645
1996	52.2545204162598
1997	56.7596282958984
1998	60.7667503356934
1999	59.7210311889648
2000	64.7059326171875
2001	67.5276794433594
2002	69.4253311157227
2003	74.2004928588867
2004	78.1838912963867
2005	80.6867828369141
2006	81.3714218139648
2007	85.3394165039062
2008	86.4965591430664
2009	86.622917175293
2010	86.8192520141602
2011	91.9459075927734
2012	91.171142578125
2013	88.8661499023438
2014	90.0958023071289
2015	89.7828674316406
2016	88.2200012207031
2017	89.318000793457
2018	89.6709976196289
2019	88.9523315429688
2020	90.5568771362305
2021	89.2337112426758
2022	90.1855087280273