Year Percent of GDP (Units) 2000 29.558 2001 27.409 2002 27.383 2003 24.880 2004 21.329 2005 17.767 2006 12.691 2007 12.431 2008 13.004 2009 22.452 2010 30.171 2011 32.599 2012 36.164 2013 39.264 2014 40.476 2015 39.354 2016 39.548 2017 37.107 2018 36.189 2019 36.629 2020 49.391 2021 51.671 2022 50.480 2023 50.655 2024 53.007 2025 56.247 2026 59.058 2027 61.364 2028 63.454 2029 65.504