Year	% gross
1970	41.8790588378906
1971	40.4537391662598
1972	41.3824195861816
1973	42.199291229248
1974	42.8190994262695
1975	45.6189308166504
1976	47.0745086669922
1977	47.907600402832
1978	48.4013710021973
1979	48.845401763916
1980	49.7303810119629
1981	48.9896087646484
1982	49.1908187866211
1983	49.6964111328125
1984	49.776050567627
1985	50.390941619873
1986	50.7950210571289
1987	50.5715103149414
1988	50.8687591552734
1989	50.8970108032227
1990	51.8156089782715
1991	52.6453514099121
1992	53.1485900878906
1993	53.4873504638672
1994	54.3033294677734
1995	55.4768486022949
1996	56.301441192627
1997	57.1960983276367
1998	57.585319519043
1999	57.422550201416
2000	58.8354911804199
2001	59.6729202270508
2002	60.8296508789062
2003	61.515510559082
2004	62.9065818786621
2005	63.7869110107422
2006	65.0038986206055
2007	66.2070693969727
2008	66.990966796875
2009	68.2703704833984
2010	69.4811935424805
2011	70.0253524780273
2012	70.7593307495117
2013	71.086181640625
2014	71.882080078125
2015	72.3014068603516
2016	73.2036895751953
2017	73.8096008300781
2018	74.2033004760742
2019	74.8760681152344
2020	74.9946365356445
2021	74.8773880004883
2022	74.977912902832