Year Percent of GDP (Units) 2000 11.432 2001 12.903 2002 12.993 2003 11.957 2004 11.799 2005 12.049 2006 11.169 2007 13.105 2008 13.391 2009 16.981 2010 16.454 2011 16.345 2012 16.768 2013 15.496 2014 16.583 2015 17.670 2016 18.961 2017 23.635 2018 27.999 2019 27.339 2020 27.609 2021 27.248 2022 26.284 2023 25.081 2024 24.419 2025 24.967 2026 25.139 2027 25.311 2028 25.407 2029 25.469