Year	% gross
1971	15.6030101776123
1972	17.1464004516602
1973	18.148099899292
1974	18.7725296020508
1976	20.7024097442627
1977	21.6402492523193
1978	22.5193004608154
1979	23.144889831543
1980	23.6109409332275
1982	25.1768207550049
1983	26.0037002563477
1984	27.3411102294922
1986	31.171760559082
1987	32.5530204772949
1988	34.2908782958984
1989	36.5934906005859
1990	37.6122207641602
1991	39.4052391052246
1992	41.2686996459961
1993	44.4333610534668
1994	46.9215888977051
1995	48.8214416503906
1997	50.0233688354492
1999	57.9589004516602
2000	63.1940116882324
2001	72.3898696899414
2002	76.3927612304688
2003	78.0895462036133
2004	77.7478103637695
2005	78.0205230712891
2006	81.7884063720703
2007	84.3841094970703
2008	84.4206237792969
2009	77.3252868652344
2010	81.3065490722656
2011	84.8130187988281
2012	83.5451507568359
2013	101.523071289062
2014	105.464340209961
2015	106.707969665527
2016	108.04418182373
2017	110.961929321289
2018	111.409126281738
2019	110.276336669922
2020	111.511711120605
2021	113.14852142334