Year	% gross
1970	27.4179401397705
1971	28.5625591278076
1972	30.6163196563721
1973	33.2289199829102
1974	36.5269889831543
1975	45.8679389953613
1976	55.9416198730469
1977	64.3875198364258
1978	84.1137008666992
1979	88.2523803710938
1980	90.0827865600586
1981	91.940803527832
1982	88.6877517700195
1983	87.6646270751953
1984	83.4192886352539
1985	73.5580215454102
1986	71.1337509155273
1987	68.4922409057617
1988	66.3819580078125
1989	65.918212890625
1990	66.5032501220703
1991	67.1689300537109
1992	66.953010559082
1993	68.0744323730469
1994	67.368408203125
1995	66.7339019775391
1996	66.3970031738281
1997	67.6674728393555
1998	66.0547866821289
1999	67.3491973876953
2000	68.3103713989258
2001	74.1426620483398
2002	88.4598083496094
2003	94.4433212280273
2004	99.5282974243164
2005	103.396820068359
2006	106.644523620605
2007	108.764442443848
2008	109.304740905762
2009	104.038269042969
2010	101.525756835938
2011	96.9979095458984
2012	93.6235961914062
2013	90.3904037475586
2014	87.3662185668945
2015	85.391960144043
2016	85.5626678466797
2017	88.8821029663086
2018	93.3810272216797
2019	95.6221084594727
2020	96.9761810302734
2021	97.5691528320312
2022	97.5619964599609