Year Percent of GDP (Units) 1999 26.616 2000 31.575 2001 33.270 2002 40.672 2003 37.724 2004 32.721 2005 28.138 2006 25.439 2007 22.611 2008 22.432 2009 26.308 2010 28.493 2011 27.180 2012 24.794 2013 26.866 2014 32.919 2015 42.081 2016 38.611 2017 38.642 2018 43.064 2019 43.055 2020 54.624 2021 54.139 2022 51.382 2023 44.391 2024 48.282 2025 49.167 2026 49.597 2027 49.580 2028 49.321 2029 48.778