Year Percent of GDP (Units) 1994 40.263 1995 38.059 1996 36.462 1997 35.042 1998 34.468 1999 42.876 2000 31.503 2001 29.578 2002 26.169 2003 28.805 2004 25.016 2005 24.217 2006 21.598 2007 20.718 2008 18.766 2009 18.611 2010 19.847 2011 16.662 2012 19.482 2013 22.694 2014 22.529 2015 25.088 2016 25.253 2017 27.573 2018 28.327 2019 26.801 2020 24.304 2021 25.451 2022 26.523 2023 17.642