Year	% gross
1971	2.1146399974823
1972	2.51446008682251
1977	5.19423007965088
1978	6.07969999313354
1980	8.11493968963623
1981	8.7801399230957
1982	9.5073299407959
1983	10.069239616394
1984	10.5131101608276
1993	12.6611204147339
1994	13.245400428772
1995	13.8754196166992
1996	15.1049604415894
1997	15.9093904495239
1998	17.0486793518066
1999	18.0914897918701
2000	19.4431095123291
2001	20.3622798919678
2002	21.3952693939209
2003	22.2903308868408
2004	23.1233406066895
2005	23.7190494537354
2006	24.1733093261719
2007	24.7962207794189
2008	25.4762992858887
2009	25.9799900054932
2010	26.9379100799561
2011	27.7940101623535
2012	29.0923099517822
2013	30.025239944458
2014	30.9848003387451
2015	31.771110534668
2016	38.8265113830566
2017	40.8725509643555
2018	42.5822601318359
2019	44.3526802062988
2020	47.0619583129883
2021	48.4712982177734
2022	50.2553291320801