Year	% gross
1971	77.1737213134766
1972	76.4305191040039
1973	77.2957534790039
1974	78.8456878662109
1975	81.0668334960938
1976	82.705078125
1977	82.1955337524414
1978	83.6625671386719
1979	85.0728225708008
1980	85.9247817993164
1981	88.1103591918945
1982	89.5142593383789
1983	92.3959121704102
1984	91.2303924560547
1985	92.0687789916992
1986	92.9773864746094
1987	94.7385330200195
1988	95.3415222167969
1989	92.0375823974609
1990	92.0309600830078
1991	89.9245681762695
1992	87.860969543457
1994	80.4860992431641
1995	78.4832229614258
1996	70.0220108032227
1997	73.8036193847656
1998	73.9161682128906
1999	75.7663192749023
2000	79.3443603515625
2001	94.3584976196289
2002	93.9895172119141
2003	93.8650283813477
2004	98.520866394043
2005	95.587890625
2006	94.2355499267578
2007	97.2780838012695
2008	97.4317169189453
2009	99.581901550293
2010	101.036170959473
2011	100.32063293457
2012	104.89485168457
2014	106.929702758789
2015	109.808532714844
2016	109.484260559082
2017	103.89575958252
2018	97.3825225830078
2019	99.5284271240234
2020	101.563003540039
2021	102.728759765625
2022	105.463836669922