Year	% gross
1970	7.0781397819519
1971	7.62089014053345
1972	8.88414001464844
1973	8.47033023834229
1974	6.99258995056152
1975	7.86726999282837
1976	7.66766977310181
1977	7.90360021591187
1978	7.32796001434326
1979	5.03240013122559
1980	2.76185011863708
1981	3.09325003623962
1982	3.14277005195618
1983	3.50317001342773
1984	4.89296007156372
1985	5.32566976547241
1986	5.78855991363525
1987	5.83756017684937
1988	5.94739007949829
1989	6.85271978378296
1990	10.0548601150513
1991	12.2720804214478
1992	13.7187700271606
1993	17.1858291625977
1994	18.4853191375732
1995	20.3612804412842
1996	21.5482501983643
1997	21.6304302215576
1998	24.1003704071045
1999	23.4010200500488
2000	21.9095897674561
2001	24.9949493408203
2002	24.2556896209717
2003	30.0867691040039
2004	26.6235694885254
2005	32.2053604125977
2006	31.2252807617188
2007	34.6690711975098
2008	33.3216094970703
2009	35.7878684997559
2010	36.8344192504883
2011	39.4486618041992
2012	42.5473289489746
2013	44.0389518737793
2014	44.4906997680664
2015	46.9468193054199
2016	48.1260795593262
2017	52.8446311950684
2018	55.7488708496094
2019	58.5368690490723
2020	62.8752517700195
2021	73.0226974487305
2022	78.6229400634766