Year	% gross
1971	12.9488096237183
1972	12.8798904418945
1973	14.0483198165894
1974	14.8266201019287
1975	16.1149597167969
1976	17.1383590698242
1977	17.3091506958008
1978	18.7630004882812
1979	21.2346496582031
1980	24.327169418335
1981	30.4341297149658
1982	33.5609092712402
1983	36.257511138916
1984	39.8792686462402
1985	41.7734107971191
1986	42.6649017333984
1987	42.2280693054199
1989	38.5253982543945
1992	42.3569107055664
1993	44.4148216247559
1994	46.9604606628418
1995	49.1658210754395
1996	53.3114204406738
1997	55.8896713256836
1998	58.2354316711426
1999	68.8056411743164
2000	69.3378982543945
2001	71.4141006469727
2002	69.8008804321289
2003	76.0767517089844
2004	78.4466323852539
2005	77.4201278686523
2006	76.6037902832031
2007	78.4842987060547
2008	77.4976196289062
2009	75.533447265625
2010	74.2670669555664
2011	72.0973281860352
2012	74.7888031005859
2013	75.8154220581055
2014	79.0059509277344
2015	81.9137878417969
2016	83.5497970581055
2017	86.8139190673828
2018	89.9447479248047
2019	94.0901565551758
2020	96.6874237060547
2021	96.9335403442383
2022	98.5130004882812
2023	100.311996459961