Year	% gross
1979	4.08945989608765
2005	11.1586303710938
2007	11.2565603256226
2008	11.3071002960205
2009	11.3458700180054
2010	11.509349822998
2011	12.4907703399658
2012	14.301609992981
2013	14.397310256958
2014	17.6277294158936
2015	21.4036903381348
2016	22.2092895507813
2017	20.9970397949219
2018	21.2317504882813
2019	21.464469909668
2020	21.794620513916
2021	18.319730758667