Year Percent of GDP 2002 48.669 2003 44.619 2004 45.836 2005 44.092 2006 22.657 2007 25.647 2008 25.612 2009 29.122 2010 31.229 2011 27.565 2012 28.367 2013 29.146 2014 29.873 2015 35.612 2016 39.159 2017 38.419 2018 42.957 2019 42.465 2020 42.148 2021 41.87 2022 41.654 2023 41.458 2024 41.26