Year Percent of GDP (Units) 2000 32.918 2001 27.244 2002 18.195 2003 22.953 2004 26.330 2005 28.949 2006 28.150 2007 30.265 2008 33.859 2009 33.188 2010 30.557 2011 23.463 2012 18.904 2013 16.286 2014 15.001 2015 16.553 2016 20.767 2017 29.052 2018 32.441 2019 23.471 2020 24.040 2021 35.260 2022 37.237 2023 27.097 2024 16.116 2025 14.937 2026 14.455 2027 14.185 2028 13.954 2029 13.594