Year	% gross
1970	96.6784362792969
1973	90.8113098144531
1974	89.6003723144531
1975	97.9312973022461
1976	103.881828308105
1977	103.661819458008
1978	101.381698608398
1979	100.815940856934
1980	100.898918151855
1981	102.129013061523
1982	102.71460723877
1983	104.825820922852
1984	106.954528808594
1985	111.115592956543
1986	115.227363586426
1987	117.247276306152
1988	116.037841796875
1989	113.993263244629
1990	110.13916015625
1991	109.122650146484
1992	108.289268493652
1993	107.491928100586
1994	107.501243591309
1995	108.045318603516
1996	108.049812316895
1997	108.430671691895
1998	108.485786437988
1999	110.043319702148
2000	111.387832641602
2001	112.495986938477
2002	111.293067932129
2003	110.187461853027
2004	109.307060241699
2005	107.830093383789
2006	106.274276733398
2007	106.664970397949
2008	107.042602539062
2009	106.830291748047
2010	106.67472076416
2011	106.384422302246
2012	106.120300292969
2013	105.509208679199
2014	102.611976623535
2015	101.658508300781
2016	101.494186401367
2017	101.303581237793
2018	100.981658935547
2019	101.133277893066
2020	101.621963500977
2021	101.870719909668
2022	102.252349853516