Year	% gross
1970	5.82335996627808
1971	5.81081008911133
1972	5.84677982330322
1973	5.89512014389038
1974	5.91517019271851
1975	5.89785003662109
1976	5.97820997238159
1977	6.03945016860962
1978	6.2835898399353
1979	6.50121021270752
1980	6.61197996139526
1981	6.86849021911621
1982	6.84650993347168
1983	7.2649998664856
1984	7.59178018569946
1985	7.54934978485107
1986	7.53497982025146
1987	7.6673698425293
1988	7.33867979049683
1989	7.439040184021
1990	7.49258995056152
1991	7.5029501914978
1992	7.40459012985229
1993	7.44144010543823
1994	7.43192005157471
1995	7.56195020675659
1996	8.21074962615967
1997	8.60669040679932
1998	9.31717967987061
1999	10.0595397949219
2000	10.6739196777344
2001	11.0850896835327
2002	11.4962301254272
2003	11.824049949646
2004	12.3218297958374
2005	12.6247701644897
2006	13.3027496337891
2007	14.5045299530029
2008	15.8418798446655
2009	16.5979499816895
2010	17.9119701385498
2011	20.4183101654053
2012	21.3952293395996
2013	21.4675197601318
2014	22.6534004211426
2015	23.4945697784424
2016	23.531530380249
2017	23.6322803497314
2018	23.7623405456543
2019	24.4315395355225
2020	24.9793605804443
2021	25.9157009124756
2022	26.5721607208252