Year % of GDP 1990 11.187508441111918 1992 10.297731298992828 2006 14.708170541079886 2007 15.777815333263836 2008 17.165161330839727 2009 20.066608037190584 2010 17.03705756537286 2011 17.230042216146725 2012 17.34626001895036 2013 17.283082661798378 2014 16.714557583309258 2015 17.701608292413294 2016 17.09115547406799 2017 16.161002008014314 2018 15.176948687713741 2019 15.451199083183397 2020 15.615540550065065 2021 15.325831659223548 2022 15.570182347769332 2023 16.500110853603687