Year % of GDP 2002 38.62789186384426 2003 37.41885544314813 2004 29.72106713769569 2005 31.114854912061997 2006 28.63596858446855 2007 30.105011357401256 2008 24.892270005974172 2009 29.29750105472589 2010 26.21006853745515 2011 23.74366398775434 2012 24.390873626370986 2013 22.810662736176635 2014 22.13704137195736 2015 20.6343227166798 2016 25.74031403645819 2017 26.420199083444835 2018 22.042896752757535 2019 25.773970739410473 2020 29.975582521046068 2021 33.597618872545105 2022 33.701432321392254