Year	% gross
1971	39.7266311645508
1972	42.1321983337402
1973	44.8617401123047
1974	43.8286209106445
1975	43.7620010375977
1976	44.901741027832
1977	43.4984016418457
1978	41.8773803710938
1979	40.8532409667969
1980	41.0702285766602
1981	41.0299606323242
1982	45.8206405639648
1983	45.9205017089844
1984	45.1981391906738
1985	46.0694694519043
1986	46.846851348877
1987	47.1087112426758
1988	48.5714302062988
1989	48.3975715637207
1990	49.608570098877
1991	49.5389785766602
1992	50.1515808105469
1993	51.6718711853027
1994	51.8369216918945
1996	55.2534599304199
1997	56.3860015869141
2000	47.660400390625
2008	92.9347763061523
2009	93.765380859375
2010	93.584602355957
2011	93.1183624267578
2012	92.257568359375
2013	91.9759979248047
2014	94.1460037231445
2015	95.3310012817383
2018	60.2405204772949
2019	59.8926696777344
2020	62.1942405700684
2021	60.2915000915527
2022	61.5030097961426