Year Percent of GDP (Units) 1990 19.791 1991 21.595 1992 21.281 1993 16.727 1994 16.682 1995 16.577 1996 17.149 1997 17.261 1998 14.987 1999 15.648 2000 16.701 2001 16.974 2002 17.586 2003 19.261 2004 19.113 2005 19.722 2006 20.351 2007 21.063 2008 25.821 2009 22.581 2010 22.678 2011 23.418 2012 23.434 2013 23.109 2014 22.578 2015 22.699 2016 23.841 2017 23.984 2018 22.831 2019 22.978 2020 23.498 2021 22.998 2022 24.307 2023 24.366 2024 24.356 2025 24.055 2026 23.803 2027 23.775 2028 23.552 2029 23.516