Year	% gross
1971	0
1972	0
1973	0.327259987592697
1974	0.692059993743896
1975	1.10476005077362
1976	2.12667989730835
1977	3.65164995193481
1978	7.76749992370605
1979	10.9714097976685
1980	14.3326501846313
1981	18.8512592315674
1982	22.0880393981934
1983	28.3127002716064
1984	31.7657909393311
1985	36.178539276123
1986	35.7460594177246
1987	36.014720916748
1988	36.338508605957
1989	37.8365211486816
1990	41.7752799987793
1991	45.4031105041504
1992	49.430118560791
1993	54.6152191162109
1994	60.0221214294434
1995	62.2378692626953
1996	64.0192184448242
1997	64.360237121582
1998	66.3617095947266
1999	68.147087097168
2000	77.3918304443359
2001	80.1735382080078
2002	83.8481521606445
2003	84.9303970336914
2005	88.85302734375
2006	91.17333984375
2007	93.2336883544922
2008	94.3434677124023
2009	100.960350036621
2011	113.572891235352
2012	110.493370056152
2013	108.257682800293
2015	102.434143066406
2016	104.208480834961
2017	102.254570007324
2018	104.900909423828
2019	103.079742431641
2020	95.5556335449219
2021	95.2648086547852
2022	92.7177886962891