Year	% gross
1983	14.4904499053955
1984	14.3870496749878
1985	14.3369903564453
1986	14.505880355835
1987	14.9277801513672
1988	15.1518802642822
1989	15.2591199874878
1990	15.3191995620728
1991	15.1918697357178
1992	15.2168703079224
1993	15.0842800140381
1994	14.8840103149414
1995	14.9435596466064
1996	15.264820098877
1997	14.798810005188
1998	14.8899002075195
1999	13.0277004241943
2000	14.2282600402832
2001	14.7323598861694
2002	15.7830801010132
2003	17.5198497772217
2004	19.0155906677246
2005	19.8291893005371
2006	21.4466209411621
2007	19.9644508361816
2008	19.5885105133057
2009	20.6838703155518
2010	21.1802406311035
2011	23.1576595306396
2012	26.3067607879639
2013	29.0434894561768
2014	23.7076091766357
2015	25.5327396392822
2016	26.6597309112549
2017	27.1220397949219
2018	26.9971408843994
2019	27.3387699127197
2020	28.065990447998