Year	% gross
1970	79.9990386962891
1971	80.1257171630859
1972	81.0083694458008
1973	82.5056076049805
1974	83.7380828857422
1975	84.6606826782227
1976	85.2157516479492
1977	85.7139282226562
1978	85.92626953125
1979	86.2205429077148
1980	86.4091873168945
1981	86.8126602172852
1982	86.9159469604492
1983	87.3974685668945
1984	87.6130065917969
1985	88.1648178100586
1986	89.4275283813477
1987	89.8691711425781
1988	90.0361099243164
1989	89.9728088378906
1990	90.1679916381836
1991	90.0634689331055
1992	90.1419219970703
1993	91.4417190551758
1994	92.2396926879883
1995	92.6534805297852
1996	92.718879699707
1997	92.3727035522461
1998	91.932991027832
1999	92.619140625
2000	93.605827331543
2001	95.3595428466797
2002	96.5577087402344
2003	97.4341125488281
2004	95.3208389282227
2005	95.0807113647461
2006	95.6330108642578
2007	96.107048034668
2008	96.7543563842773
2009	96.623893737793
2010	98.2117385864258
2011	98.4706497192383
2012	98.2246170043945
2013	104.179908752441
2014	104.620620727539
2015	104.38703918457
2016	104.336410522461
2017	104.888610839844
2018	104.836936950684
2019	104.433006286621
2020	103.645736694336
2021	103.45304107666
2022	103.500640869141