Year	% gross
1970	3.33478999137878
1971	2.69184994697571
1972	2.73158001899719
1973	2.42664003372192
1978	2.30945992469788
1980	7.10898017883301
1982	8.66314029693604
1983	10.8617496490479
1984	12.653829574585
1985	12.9854202270508
1986	14.5057401657104
1987	15.171950340271
1988	14.4112100601196
1989	12.4826097488403
1990	12.0371398925781
1991	13.0026798248291
1992	12.6753902435303
1993	14.9777698516846
1994	18.180980682373
1995	18.5988693237305
1996	21.5521697998047
1997	24.763500213623
1998	26.4242992401123
1999	29.8561191558838
2000	31.1524391174316
2001	30.6774005889893
2002	33.947811126709
2003	35.6104698181152
2004	38.838550567627
2005	41.5739898681641
2006	54.5323104858398
2007	55.6583290100098
2008	56.8697090148926
2010	56.467700958252
2011	59.4025192260742
2012	61.2605400085449
2013	60.2366218566895
2014	64.2609786987305
2015	64.2594604492188
2016	68.5190811157227
2017	73.7842178344727
2018	72.1382522583008
2019	71.3201217651367
2020	70.4275817871094