Year	% of revenue
1984	7.552433534074489
1986	2.049798223531419
1987	8.225003104347465
1988	9.396641499609476
1989	14.39988892712763
1991	7.441774954200264
1992	6.6525820235927196
1993	4.913818711432884
1994	4.254878502037568
1995	4.725232736739363
1996	1.558317338765411
1997	2.4680712752152396
1998	6.290531677862965
1999	4.503495733384297
2000	6.62609101727739
2001	5.162418032134413
2002	6.6303370964507184
2003	6.1411173611490355
2004	3.695734417856805
2005	2.5336857713880474
2006	4.724204307437313
2007	4.202833376158079
2008	1.3080036274074982
2009	1.339901784324381
2010	1.03335196463399
2011	1.4434097493821656
2012	1.2498026803557918
2013	1.429757727074143
2014	1.198782590294436
2015	1.7433509324130212
2016	1.7572479284045242
2017	2.1585699066067674
2018	2.783891769677337
2019	3.0505670349817837
2020	2.9198700812206515
2021	2.408649721939865
2022	3.347502783548304