Year Percent of GDP (Units) 1993 20.047 1994 25.697 1995 26.141 1996 23.960 1997 26.182 1998 24.892 1999 24.802 2000 23.912 2001 22.736 2002 22.528 2003 20.819 2004 20.555 2005 22.423 2006 21.722 2007 23.497 2008 21.706 2009 17.122 2010 19.866 2011 20.926 2012 21.309 2013 22.939 2014 23.203 2015 22.627 2016 20.166 2017 21.438 2018 21.253 2019 20.477 2020 19.991 2021 19.693 2022 15.224 2023 17.327 2024 18.431 2025 19.670 2026 20.743 2027 21.419 2028 22.058 2029 22.647