Year	% gross
1971	22.6494598388672
1972	23.3882102966309
1973	22.6708297729492
1974	23.0284404754639
1975	22.8927803039551
1976	28.9773502349854
1977	30.6318702697754
1978	34.2740287780762
1979	35.8992805480957
1980	36.6087112426758
1981	31.4089107513428
1982	32.2606315612793
1983	32.7024116516113
1984	32.2114601135254
1985	30.3016700744629
1986	28.9033393859863
1987	28.1111698150635
1988	28.5599308013916
1989	29.6769504547119
1990	30.9680404663086
1991	32.8466911315918
1992	35.936279296875
1993	38.9117813110352
1994	40.7989807128906
1995	43.1767883300781
1996	46.9709091186523
1997	50.8049507141113
1998	53.207878112793
1999	64.9735794067383
2000	67.6448364257812
2001	70.0115203857422
2002	74.7414321899414
2003	80.4902877807617
2004	83.0349807739258
2005	81.7390899658203
2006	79.3352279663086
2007	75.3943710327148
2008	71.158073425293
2009	71.0115814208984
2010	73.0818328857422
2011	71.9184112548828
2012	68.742301940918
2013	65.7820892333984
2014	64.9541931152344
2015	66.4283218383789
2016	68.306037902832
2017	70.4342498779297
2018	73.4083786010742
2019	75.1148529052734
2020	79.1196365356445
2021	85.9426193237305
2022	83.8976135253906