Year Percent of GDP 1998 16.794 1999 17.54 2000 19.157 2001 18.391 2002 19.182 2003 19.088 2004 20.301 2005 22.983 2006 21.917 2007 27.996 2008 27.181 2009 28.644 2010 26.139 2011 27.027 2012 24.545 2013 27.84 2014 28.521 2015 31.916 2016 38.946 2017 35.632 2018 31.719 2019 32.384 2020 31.601 2021 31.84 2022 31.918 2023 32.168 2024 32.484