Year	% gross
2002	6.63361978530884
2005	11.6393699645996
2013	13.9189767837524
2014	17.401481628418
2015	20.4670677185059
2016	21.4252586364746
2017	23.4475345611572
2018	22.7661037445068
2019	25.0940799713135
2020	27.8652362823486