Year	% gross
1971	10.3516597747803
1972	10.6997299194336
1973	10.7275695800781
1974	10.7325201034546
1975	11.0529098510742
1976	12.7303600311279
1977	12.971489906311
1978	13.9067802429199
1979	15.5591602325439
1980	18.517749786377
1982	27.3549995422363
1983	33.824520111084
1984	38.3867301940918
1985	41.5275497436523
1986	46.6161689758301
1987	48.4170799255371
1988	47.9861106872559
1989	46.8166618347168
1990	46.5375595092773
1991	47.0673408508301
1992	49.5251693725586
1993	52.7310104370117
1994	55.245979309082
1995	59.8149795532227
1996	66.57080078125
1997	84.1257705688477
1998	84.0987396240234
1999	88.1994934082031
2000	93.4576873779297
2001	95.9933090209961
2002	99.3186264038086
2003	103.31974029541
2004	108.895576477051
2005	114.81462097168
2006	118.987831115723
2007	121.140319824219
2008	119.995269775391
2009	118.641761779785
2010	116.292098999023
2011	114.444702148438
2012	110.888542175293
2013	108.160667419434
2014	105.634468078613
2015	104.562812805176
2016	103.883453369141
2017	103.625427246094
2018	102.527328491211
2019	102.573348999023
2020	105.305763244629
2021	108.358261108398
2022	110.660179138184