Year % of GDP 2002 19.07200369581141 2003 18.100323653566285 2004 20.573987927613587 2005 22.00599978137409 2006 22.364418008896415 2007 23.40543542295214 2008 23.989982106001694 2009 24.919764279654117 2010 27.099889680405205 2011 27.619724432197707 2012 28.463861019201815 2013 28.5969816165801 2014 29.2324482406135 2015 29.94653411732414 2016 31.5121939437604 2017 34.22753083461777 2018 38.3426050870309 2019 42.69517314646091 2020 49.05989406416316 2021 51.015816984301985 2022 53.55897836139596 2023 56.973315102686925