Year % of GDP 1994 23.797021806524818 1995 23.787373280999557 1998 21.668443729470514 1999 23.917113429321322 2000 26.336468183104046 2001 27.833507351708654 2002 30.717806272683134 2003 28.396777356650333 2004 27.788486086540928 2007 32.41317207080869 2008 33.25001559951134 2009 29.016519991774516 2010 28.937783119555284 2011 30.085174163752114 2012 29.287924523233716 2013 28.891989565615614 2014 28.98815216541948 2015 27.672851310659862 2016 27.472603598831082 2017 27.45341783676484 2018 29.16706605295813 2019 28.893989624723496 2020 28.874104787881187 2021 28.573957453278627 2022 28.595325638477043