Year	% of revenue
2005	1.4769631244944272
2006	1.3638305705408575
2007	1.1963634286262859
2008	1.1806415532273522
2009	1.2027208926739263
2010	1.1062948110557003
2011	1.4026794497262722
2012	1.7414077806745076
2013	1.73253256771841
2014	1.974951913056214
2015	2.162731384180524
2016	2.024300413000934
2017	1.7168072627101467
2018	1.7219868831089842
2019	1.6261480407878373
2020	1.8068061369949107
2021	1.5122044405442436
2022	1.4742182581224161