Year Percent of GDP 2000 19.015 2001 20.187 2002 18.35 2003 20.892 2004 21.425 2005 20.757 2006 21.651 2007 21.339 2008 20.126 2009 22.918 2010 24.107 2011 23.666 2012 24.328 2013 24.619 2014 24.283 2015 24.206 2016 24.515 2017 24.715 2018 24.474 2019 24.759 2020 25.279 2021 25.362 2022 25.874 2023 26.258 2024 26.454