Year	% of revenue
1994	32.12835093419978
1995	31.064529621921658
1996	32.807638410564564
1997	32.411954893098084
1998	34.09141148815927
1999	34.280468311654246
2000	32.972862184370044
2001	33.67033151555779
2002	33.16508239071004
2003	34.43745627692289
2004	34.379364805862
2005	33.58006880651088
2006	34.09188871347521
2007	34.05473858341708
2008	33.25308012379439
2009	33.46140746148745
2010	33.56388072503691
2011	34.78478028868439
2012	34.4279281554318
2013	33.981305093206345
2014	33.82188665590966
2015	35.128015113353584
2016	35.70111438482941
2017	35.012640448613325
2018	34.71199366053477
2019	33.94585011118457
2020	33.16388924894191
2021	33.02827921754489
2022	32.57375974609178