Year Percent of GDP (Units) 2008 34.339 2009 32.737 2010 30.491 2011 29.564 2012 37.937 2013 39.486 2014 40.758 2015 44.395 2016 44.300 2017 44.243 2018 46.570 2019 49.881 2020 57.297 2021 54.135 2022 51.575 2023 52.358 2024 54.012 2025 54.426 2026 54.637 2027 54.679 2028 54.695 2029 54.710