Year % of GDP 2005 26.056628480124992 2006 26.73594839642287 2007 28.189830770090683 2008 28.70135180118793 2009 24.83952731254508 2010 25.82489473056453 2011 26.09453032855285 2012 25.775117638695487 2013 25.484161161238504 2014 25.986131228842723 2015 25.653313386418258 2016 27.118918315288727 2017 26.342632963114898 2018 26.769768287281188 2019 27.834726527620298 2020 29.214580493816232 2021 29.314176275754367 2022 27.56549755145811 2023 27.05366709312199