Year % of revenue 2005 2.828220225183349 2006 4.357259569452753 2007 0.9198969763868988 2008 0.7298879351807082 2009 0.5335162205126252 2010 0.4617786171186445 2011 0.3726538276692039 2012 0.38400242451055566 2013 0.4181974851235508 2014 0.597735373093857 2015 0.8209928391964124 2016 0.9403936504163681 2017 0.9518713190224632 2018 0.8316948133659099 2019 0.8236898436748716 2020 0.7344989083763884 2021 0.9258104884690666 2022 0.8627249730374151