Year % of GDP 2005 134.91145978269154 2006 144.5555110688931 2007 146.04912247329202 2008 166.73954173154425 2009 144.7023416599163 2010 143.93221182381598 2011 172.92341799219966 2012 183.23646073840962 2013 166.40614908657648 2014 164.3598181522198 2015 148.3138159255414 2016 139.0529791370293 2017 139.81244954391428 2018 155.2688587716874