Year Percent of GDP (Units) 2000 14.543 2001 12.060 2002 12.734 2003 8.980 2004 12.125 2005 11.687 2006 10.646 2007 16.051 2008 21.781 2009 23.952 2010 25.063 2011 29.848 2012 30.752 2013 27.416 2014 33.442 2015 37.123 2016 35.752 2017 35.080 2018 32.660 2019 32.313 2020 35.286 2021 29.788 2022 26.931 2023 25.295 2024 25.452 2025 25.932 2026 25.675 2027 25.242 2028 24.827 2029 23.660