Year	% gross
1974	25.5850601196289
1975	26.3046398162842
1976	26.9338798522949
1977	26.2162895202637
1978	25.4995193481445
1979	25.9638195037842
1980	25.3088798522949
1981	26.4192600250244
1982	29.5057697296143
1983	32.2916107177734
1984	32.6388511657715
1985	33.2013511657715
1986	34.256519317627
1987	37.3847503662109
1988	39.8028907775879
1989	42.6669883728027
1990	42.6140098571777
1991	42.5457000732422
1992	42.288158416748
1993	40.7878494262695
1994	41.6632995605469
1995	41.709098815918
1996	45.0422515869141
1997	51.2955207824707
1998	56.1139183044434
1999	59.5598487854004
2000	63.4898490905762
2001	64.7733917236328
2002	66.8602066040039
2003	65.8296966552734
2004	67.6580276489258
2005	87.2383422851563
2006	95.2147903442383
2007	81.1583862304688
2008	87.1358032226563
2009	90.4450073242188
2010	90.6590881347656
2011	89.1325607299805
2012	91.1414489746094
2013	92.2700576782227
2014	92.5089797973633
2015	94.009880065918
2016	94.2015380859375
2017	93.388557434082
2018	94.9763793945313
2019	95.9006881713867
2020	97.1439590454102