Year Percent of GDP 1999 20.876 2000 21.35 2001 22.706 2002 23.186 2003 23.108 2004 23.851 2005 25.487 2006 27.603 2007 27.03 2008 27.97 2009 28.515 2010 26.483 2011 26.722 2012 30.256 2013 35.492 2014 36.246 2015 37.833 2016 42.418 2017 44.205 2018 49.315 2019 51.267 2020 46.681 2021 46.029 2022 45.685 2023 43.604 2024 43.062