Year Percent of GDP (Units) 2000 9.538 2001 9.681 2002 8.595 2003 9.302 2004 12.377 2005 12.947 2006 14.021 2007 11.194 2008 11.551 2009 14.353 2010 14.555 2011 16.544 2012 19.119 2013 17.179 2014 18.982 2015 19.578 2016 19.372 2017 23.622 2018 19.008 2019 23.935 2020 25.348 2021 21.496 2022 22.318 2023 24.601 2024 22.665 2025 20.856 2026 20.499 2027 19.944 2028 19.646 2029 20.976