Year Percent of GDP 2000 5.664 2001 11.455 2002 17.46 2003 19.876 2004 20.969 2005 20.919 2006 23.062 2007 25.947 2008 24.291 2009 28.289 2010 26.176 2011 27.104 2012 26.129 2013 24.639 2014 23.963 2015 25.059 2016 26.286 2017 26.217 2018 25.98 2019 26.921 2020 26.227 2021 26.034 2022 25.76 2023 25.53 2024 25.254