Year	% of revenue
1997	4.443595620066208
1998	4.083712218626114
1999	3.696956001845418
2000	6.711270425728168
2001	0.17276065132050272
2002	0.3856662485928559
2003	0.31913752113823557
2004	0.16322358130934336
2010	1.9577226950532503
2011	2.841238210135707
2012	2.546435042694034E-05
2013	2.390910489197875
2014	7.323582213475916E-05
2015	0.0015496992141844296
2016	0.005827038209759607
2017	0.00455485813849772
2018	0.007722724544316873
2019	0.0047690637197259755
2020	0.03103168327887197
2021	-0.0009102328375598477