Year	% of revenue
1992	28.176071862010502
1993	35.82024320367766
1994	31.384155127188293
1995	32.1240468796695
1996	33.68569798092339
1997	35.50274104430004
1998	39.73867074075842
1999	38.79730729740955
2000	30.531383818142046
2001	30.680062772566757
2002	30.922736860977245
2003	28.692922490687483
2004	30.086255431551745
2005	29.016740753503417
2006	35.99789635713027
2007	26.732441318758376
2008	34.91427372313659
2009	30.992806738601466
2010	33.22232105880072
2011	34.82052314824321
2012	30.36091148572634
2013	30.636586749880664
2014	33.77271163215539
2015	28.899085925892493
2016	21.232323217131075
2017	23.872198725992906
2018	24.39194825568186
2019	24.796621472933584
2020	27.54634920145885
2021	31.549433166647418
2022	33.49737500477089