Year	% gross
1971	13.6062803268433
1972	14.1353902816772
1973	14.7131795883179
1974	15.9845199584961
1975	17.0533504486084
1976	27.4120292663574
1977	29.2845001220703
1978	30.780740737915
1979	31.4591503143311
1980	32.0337409973145
1981	32.6207885742188
1982	33.1858787536621
1983	33.6237716674805
1984	31.6123905181885
1985	32.0648384094238
1986	34.1089210510254
1987	36.0473899841309
1988	38.2385711669922
1989	41.5594596862793
1990	45.2597808837891
1991	50.0253601074219
1992	54.5085983276367
1993	61.5648918151855
1994	65.078987121582
1995	67.2521362304688
1996	68.9032897949219
1997	71.2885284423828
1998	76.7278900146484
1999	80.0922470092773
2000	82.5875015258789
2001	85.9510498046875
2002	86.788932800293
2003	88.286979675293
2004	90.1379318237305
2005	91.9409408569336
2006	93.4309921264648
2007	95.0834808349609
2008	95.8668518066406
2009	92.0154724121094
2010	93.1867599487305
2011	93.2884292602539
2012	91.5533828735352
2013	91.2365264892578
2014	89.9938812255859
2015	89.6573791503906
2016	89.3280029296875
2017	90.6983871459961
2018	92.3850021362305
2019	94.5891189575195
2020	96.4726333618164
2021	100.868072509766
2022	104.944221496582