Year Percent of GDP (Units) 2000 21.264 2001 21.605 2002 21.255 2003 21.031 2004 21.664 2005 25.039 2006 25.480 2007 25.644 2008 25.521 2009 23.790 2010 23.826 2011 24.375 2012 24.579 2013 25.006 2014 25.395 2015 25.790 2016 26.184 2017 25.844 2018 26.420 2019 26.698 2020 24.971 2021 27.068 2022 27.736 2023 26.957 2024 27.074 2025 27.115 2026 27.127 2027 27.159 2028 27.197 2029 27.205