Year Percent of GDP (Units) 1995 34.171 1996 36.106 1997 32.978 1998 30.941 1999 29.826 2000 31.946 2001 32.121 2002 30.617 2003 29.694 2004 30.025 2005 29.551 2006 30.383 2007 32.394 2008 31.331 2009 26.801 2010 27.360 2011 27.191 2012 26.360 2013 25.013 2014 26.010 2015 27.983 2016 26.024 2017 26.372 2018 27.197 2019 27.607 2020 26.154 2021 30.218 2022 32.155 2023 29.031 2024 27.543 2025 26.886 2026 26.602 2027 26.643 2028 26.761 2029 26.886