Year	% gross
1970	76.4131164550781
1971	75.336181640625
1972	75.3125762939453
1973	77.0290222167969
1974	77.0372695922852
1975	81.2334136962891
1976	84.0635681152344
1977	85.1540908813477
1978	84.1596298217773
1979	84.9187927246094
1980	85.7382431030273
1981	86.8760986328125
1982	87.6028366088867
1983	88.4230804443359
1984	89.6712036132812
1985	90.7442626953125
1986	92.1225433349609
1987	92.048469543457
1988	92.0935516357422
1989	91.5792465209961
1990	90.5432510375977
1991	90.2914428710938
1992	90.0522079467773
1993	90.4824905395508
1994	90.9427490234375
1995	91.061897277832
1996	90.9094924926758
1997	91.7698516845703
1998	92.1523513793945
1999	92.9997329711914
2000	94.0029220581055
2001	94.6665725708008
2002	95.1862487792969
2003	98.0783386230469
2004	99.0196914672852
2005	99.5572814941406
2006	99.7837066650391
2007	100.885108947754
2008	101.532409667969
2009	101.571762084961
2010	100.907531738281
2011	100.782768249512
2012	101.654411315918
2013	102.965560913086
2014	101.429573059082
2015	101.082489013672
2016	102.793830871582
2017	102.285118103027
2018	98.1504135131836
2019	98.3960266113281
2020	99.0106201171875
2021	99.0898208618164
2022	100.581443786621