Year Percent of GDP 2000 23.664 2001 24.079 2002 23.759 2003 23.642 2004 24.243 2005 28.058 2006 28.504 2007 28.531 2008 28.136 2009 26.507 2010 26.42 2011 26.8 2012 26.942 2013 27.326 2014 27.589 2015 28.152 2016 28.595 2017 28.255 2018 29.115 2019 29.539 2020 29.661 2021 29.727 2022 29.677 2023 29.665 2024 29.718