Year	% gross
1971	24.9826793670654
1972	26.8050804138184
1973	29.0345306396484
1974	31.5103702545166
1975	34.332649230957
1976	37.9230613708496
1977	40.79833984375
1978	42.8571815490723
1979	44.988468170166
1980	47.517219543457
1981	50.7011985778809
1982	53.0294303894043
1983	54.8862915039062
1984	52.3245506286621
1985	55.8935508728027
1986	55.9384384155273
1987	56.368091583252
1988	56.9765090942383
1990	56.4622192382812
1991	55.068229675293
1992	55.9352989196777
1993	55.2155303955078
1996	52.072639465332
1998	54.2544288635254
1999	55.7297286987305
2000	55.7907791137695
2001	56.209098815918
2002	57.2972984313965
2003	57.0297508239746
2004	57.815559387207
2005	60.5574417114258
2006	62.902229309082
2007	64.5651702880859
2009	87.5081405639648
2010	91.6027221679688
2011	96.2048187255859
2012	99.6491088867188
2013	102.511070251465
2014	105.42603302002
2015	104.620429992676
2016	104.213706970215
2017	102.619369506836
2018	101.742309570312
2019	100.285942077637
2020	99.8858871459961
2021	99.6560287475586
2022	98.1546936035156