Year Percent of GDP (Units) 2001 11.557 2002 17.211 2003 16.062 2004 16.914 2005 14.478 2006 14.154 2007 12.628 2008 15.489 2009 20.066 2010 19.964 2011 16.621 2012 17.242 2013 23.160 2014 21.010 2015 19.307 2016 21.460 2017 56.733 2018 57.203 2019 57.411 2020 71.647 2021 81.322 2022 76.551 2023 73.447 2024 68.671 2025 67.633 2026 66.447 2027 65.146 2028 63.071 2029 61.004