Year	% of revenue
1985	0.6881720430107527
1986	10.708645874457165
1987	4.376646553921986
1988	6.089676746611053
1989	2.4863935835004294
1990	4.721916904814245
1991	1.3604358492369453
1992	1.208168779879443
1993	1.1077562167048098
1994	0.5142256587343292
1995	0.706872176821489
1996	0.47895770312582925
1997	0.2764112187452452
1998	4.63412461586425
1999	4.22212501822575
2000	0.14699973540047628
2001	1.4249755987507324
2002	1.3023919238455708
2003	1.7537142209106065
2004	6.0472253907030895
2005	2.0361443867125066
2006	1.3841983431715983
2007	2.921644484879796