Year Percent of GDP (Units) 2005 37.408 2006 37.494 2007 32.398 2008 19.758 2009 20.565 2010 21.059 2011 19.098 2012 19.275 2013 17.790 2014 16.387 2015 14.370 2016 11.489 2017 12.050 2018 11.858 2019 11.537 2020 12.267 2021 11.538 2022 10.066 2023 8.287 2024 7.003 2025 5.938 2026 5.008 2027 8.918 2028 13.383 2029 17.917