Year	% of revenue
2005	77.68765996369689
2006	56.78959218979561
2007	37.73707808069371
2008	56.86332561479107
2009	60.11020982722015
2010	63.37455077975829
2011	62.13174889210562
2012	61.327639259770436
2013	57.97895350418687
2014	38.42374604933204
2015	35.31050746093051
2016	34.74631590411139
2017	35.9495456293082
2018	32.63841809290188
2019	31.928630103184098
2020	34.39349328224138
2021	31.23081999095552
2022	29.280483663244013