Year	% gross
1971	3.17226004600525
1973	4.03456020355225
1975	8.5190896987915
1978	21.444450378418
1979	22.8840503692627
1980	27.001880645752
1981	21.7428894042969
1982	19.2407703399658
1983	18.9961204528809
1984	19.5246200561523
1985	20.0684795379639
1986	21.2055702209473
1987	28.4678993225098
1988	32.9969482421875
1989	32.4248580932617
1990	35.7065505981445
1999	45.7014083862305
2000	59.8854713439941
2001	56.6045112609863
2002	60.1982917785645
2003	64.5251693725586
2004	66.375617980957
2005	59.0975494384766
2006	79.6970291137695
2007	86.875617980957
2008	97.6486434936523
2009	118.418907165527
2011	110.783790588379
2012	112.291160583496
2013	114.306632995605
2014	114.816009521484
2015	120.864250183105
2016	119.021461486816
2017	116.79411315918
2018	114.547050476074
2019	117.012336730957
2020	116.13671875