Year	% gross
1970	7.28331995010376
1971	7.26411008834839
1972	7.64365005493164
1973	8.10824012756348
1974	8.61968040466309
1975	9.3245096206665
1976	10.1696395874023
1977	11.3127603530884
1978	11.9142303466797
1979	11.6963396072388
1980	12.0071401596069
1981	12.5869703292847
1982	12.9532804489136
1983	13.0353202819824
1984	13.2583103179932
1985	13.050009727478
1986	13.5197401046753
1987	13.5777196884155
1988	13.246129989624
1989	12.6702499389648
1990	12.4569797515869
1991	11.8982696533203
1992	12.5549201965332
1993	13.3602800369263
1994	13.9205303192139
1995	14.6501903533936
1996	15.5622797012329
1997	16.4568500518799
1998	17.0730400085449
1999	18.2340297698975
2000	18.2462692260742
2001	18.7132797241211
2002	19.4227504730225
2003	19.1376991271973
2004	20.5365104675293
2005	21.3399600982666
2006	21.3505401611328
2007	22.1390991210938
2008	21.871789932251
2009	22.4957809448242
2010	23.202220916748
2011	22.9054908752441
2012	24.3784408569336
2013	26.1038494110107
2014	27.3193397521973
2015	28.3501091003418
2016	28.384729385376
2017	29.5300407409668
2018	30.396240234375
2019	31.3812503814697
2020	31.9153499603271
2021	32.1936683654785
2022	32.0850715637207