Year Percent of GDP (Units) 2000 14.462 2001 11.121 2002 11.160 2003 9.336 2004 11.570 2005 11.181 2006 14.877 2007 18.329 2008 19.079 2009 22.552 2010 26.227 2011 25.455 2012 27.894 2013 28.706 2014 28.523 2015 33.386 2016 31.925 2017 27.946 2018 27.957 2019 27.389 2020 31.266 2021 27.284 2022 21.599 2023 18.855 2024 20.479 2025 20.936 2026 20.708 2027 20.447 2028 20.211 2029 19.873