Year	% of revenue
1992	21.10953920776071
1993	45.401040806211796
1994	32.76465306375205
1995	31.39704275620948
1996	23.460427080063425
1997	25.472807890688625
1998	10.562725232124855
1999	6.804061891748423
2000	11.81747424244423
2001	7.678703752165876
2002	11.399291371320523
2003	16.14243844012509
2006	35.41396073901514
2007	14.754539082885005
2008	36.52757884753713
2009	20.612998448941386
2010	27.123881747016586
2011	15.13587323128036
2012	11.363640839493222
2013	12.201226279066695
2014	10.761228101338833
2015	12.686856041185537
2016	9.631865433136115
2017	13.340474663900908
2018	16.614708020004347
2019	15.89715352645629
2020	12.460650252485742
2021	16.50625933981544