Year Percent of GDP (Units) 2009 22.268 2010 20.325 2011 22.637 2012 25.791 2013 26.468 2014 20.625 2015 21.670 2016 25.548 2017 29.210 2018 28.668 2019 28.885 2020 26.433 2021 27.221 2022 24.715 2023 24.654 2024 24.494 2025 26.150 2026 27.200 2027 28.115 2028 29.225 2029 30.125