Year Percent of GDP (Units) 2001 41.383 2002 46.113 2003 42.742 2004 41.092 2005 43.361 2006 42.742 2007 41.581 2008 41.674 2009 41.713 2010 42.165 2011 42.066 2012 41.923 2013 42.548 2014 44.168 2015 49.150 2016 48.592 2017 48.289 2018 47.510 2019 46.808 2020 49.915 2021 42.944 2022 45.626 2023 47.850 2024 47.194 2025 46.661 2026 46.502 2027 46.282 2028 46.066 2029 46.004