Year	% gross
1970	5.08118009567261
1971	5.2402400970459
1972	5.5916600227356
1973	6.06405019760132
1974	6.22958993911743
1975	6.50696992874146
1976	6.80935001373291
1977	7.16273021697998
1978	8.08887958526611
1979	8.85830020904541
1980	9.82719993591309
1981	11.5059700012207
1982	13.2434597015381
1983	13.2400999069214
1984	13.4329700469971
1985	15.8200597763062
1986	17.0442295074463
1987	17.7062797546387
1988	17.3414001464844
1989	16.4804401397705
1990	16.5905990600586
1991	16.8413391113281
1992	17.0433101654053
1993	17.202600479126
1994	17.3530597686768
1995	17.4952697753906
1996	17.7362899780273
1997	17.8964900970459
1998	18.0639095306396
1999	18.5329608917236
2000	19.1401500701904
2001	20.5918598175049
2002	21.0446891784668
2003	23.0367698669434
2004	24.658519744873
2005	25.6945705413818
2006	25.8483295440674
2007	25.7934799194336
2008	28.6257305145264
2009	31.3861999511719
2010	34.5288696289062
2011	36.1270484924316
2012	38.3536491394043
2013	43.1093482971191
2014	39.2785797119141
2015	40.8707313537598
2016	39.568920135498
2017	40.2464904785156
2018	40.9867897033691
2019	42.2567710876465
2020	43.4889907836914
2021	44.3662109375
2022	44.0956497192383