Year	% gross
1971	7.96019983291626
1972	7.75345993041992
1973	7.65859985351562
1974	7.86882019042969
1975	10.9141902923584
1976	14.1404895782471
1977	14.8252897262573
1978	13.8003797531128
1979	12.2014303207397
1980	9.70578002929688
1982	7.7905797958374
1983	7.82780981063843
1984	8.57625961303711
1985	10.815710067749
1986	11.4343299865723
1987	12.0470504760742
1988	12.683349609375
1989	13.907509803772
1990	15.7078504562378
1991	17.5037994384766
1992	18.455810546875
1993	20.5242805480957
1994	23.8756198883057
1995	23.8509006500244
1997	29.7182502746582
1998	26.8782901763916
1999	27.6786994934082
2001	29.1831607818604
2002	29.9242401123047
2003	33.7578582763672
2004	35.4285697937012
2005	37.9022102355957
2006	42.1627998352051
2007	44.2884216308594
2008	45.4244194030762
2009	51.8508415222168
2010	61.6783218383789
2011	65.9044494628906
2012	74.8766479492188
2013	84.8869781494141
2014	92.2421722412109
2015	101.024688720703
2016	109.631813049316
2017	116.50129699707
2018	120.712043762207
2019	119.851821899414
2020	119.907112121582
2021	124.792427062988