Year Percent of GDP 2006 33.447 2007 36.897 2008 40.764 2009 46.508 2010 48.339 2011 49.997 2012 53.732 2013 52.308 2014 54.546 2015 52.736 2016 50.058 2017 51.644 2018 54.647 2019 57.703 2020 59.77 2021 60.519 2022 61.108 2023 61.525 2024 61.913