Year Percent of GDP (Units) 2005 15.674 2006 8.542 2007 5.113 2008 3.787 2009 11.835 2010 18.090 2011 23.240 2012 20.402 2013 20.918 2014 20.445 2015 20.519 2016 23.657 2017 27.870 2018 20.226 2019 11.707 2020 12.524 2021 17.509 2022 22.618 2023 24.298 2024 26.419 2025 26.249 2026 26.189 2027 26.165 2028 26.185 2029 26.141