Year % of GDP 2003 16.73365231259968 2004 20.81132775700134 2005 35.116502522219555 2006 33.38726846923568 2007 31.30779640628524 2008 30.425602660016626 2009 30.58654913081001 2010 31.544939942012977 2011 24.558705947475246 2012 25.485517636937193 2013 30.559430877858123 2014 30.518867445661552 2015 29.565192190654678 2016 29.08321476779395 2017 25.979918570146985 2018 26.83251473095095 2019 27.625812301647272 2020 25.12166125069351 2021 26.57872785855645 2022 29.18861794982191