Year	% gross
1970	69.3636093139648
1971	71.5196304321289
1972	70.5575180053711
1973	71.7967300415039
1975	73.2238616943359
1976	75.026611328125
1977	74.1261901855469
1978	72.9447937011719
1979	77.457763671875
1980	85.7040786743164
1982	86.2498474121094
1983	88.1310729980469
1984	84.8958206176758
1985	89.1134414672852
1986	85.7307891845703
1987	87.8775482177734
1988	88.7240676879883
1989	85.8860092163086
1990	88.1381988525391
1991	91.7129592895508
1992	93.5785675048828
1993	96.1534423828125
1994	97.9262008666992
1995	96.6910705566406
1996	95.2004318237305
1997	96.2030181884766
1998	95.9832611083984
1999	100.085716247559
2000	100.597747802734
2001	103.477058410645
2002	108.94132232666
2003	109.004348754883
2004	110.64412689209
2005	111.194061279297
2006	114.570030212402
2007	113.963432312012
2008	113.667098999023
2010	112.840911865234
2011	113.305000305176
2012	110.861000061035
2013	108.517997741699
2014	105.151000976562
2015	105.968002319336
2016	109.686996459961
2017	110.664001464844
2018	108.081001281738
2019	107.070999145508
2020	106.074996948242
2021	105.38500213623