Year Percent of GDP (Units) 2001 9.241 2002 9.892 2003 13.633 2004 16.069 2005 25.537 2006 33.520 2007 36.547 2008 30.405 2009 18.505 2010 13.247 2011 13.773 2012 14.647 2013 14.069 2014 19.796 2015 25.337 2016 21.848 2017 19.583 2018 17.248 2019 14.140 2020 26.088 2021 22.816 2022 23.573 2023 13.962 2024 12.823 2025 12.231 2026 12.282 2027 12.508 2028 12.755 2029 13.020