Year % of GDP 2005 2.7360649292965933 2006 7.262768228259134 2007 7.6502023558197925 2008 6.6476468455209785 2009 11.126705364026844 2010 11.679320857159174 2011 11.775349038083231 2012 11.574933089168105 2013 15.404942253236722 2014 15.885945019062325 2015 21.78350877823132 2016 25.208506618338294 2017 23.694936991701514 2018 23.527837409956632 2019 25.460671987187254 2020 28.434931581467353 2021 25.488807803307388 2022 23.69731650454705 2023 26.04022097187836