Year % (cumulative) 2005 9.85415077209473 2006 10.4598875045776 2007 10.8301038742065 2008 11.3845596313477 2009 12.0256910324097 2010 12.4994487762451 2011 14.5817098617554 2012 15.1140613555908 2015 16.9184608459473 2016 20.6771507263184 2017 17.5298233032227