Year	% gross
1971	1.49278998374939
1972	2.06990003585815
1973	2.39248991012573
1974	2.41484999656677
1975	2.49037003517151
1976	2.65989995002747
1977	2.76651000976562
1978	2.94086003303528
1996	14.2735795974731
1999	17.0452308654785
2000	17.8140697479248
2001	19.3768100738525
2002	18.8082695007324
2003	20.6804294586182
2004	22.9865703582764
2005	24.1381092071533
2006	27.2965106964111
2007	32.7882499694824
2008	40.2417106628418
2009	39.0286712646484
2010	43.7015800476074
2011	48.7871284484863
2012	54.6285400390625
2013	55.4579200744629
2014	62.3681488037109
2015	67.1035308837891
2016	64.5967636108398
2017	63.4283409118652
2018	59.2606010437012
2019	57.8826599121094
2020	56.5558586120605
2021	56.0174293518066
2022	60.7095985412598
