Year Percent of GDP (Units) 1982 16.181 1983 14.627 1984 14.873 1985 15.588 1986 15.295 1987 15.476 1988 15.935 1989 16.312 1990 17.183 1991 16.437 1992 17.601 1993 18.922 1994 18.796 1995 17.328 1996 15.219 1997 15.552 1998 15.343 1999 13.682 2000 14.094 2001 14.940 2002 15.651 2003 16.013 2004 15.448 2005 16.249 2006 17.310 2007 18.076 2008 18.915 2009 20.274 2010 21.543 2011 20.118 2012 22.098 2013 23.230 2014 23.425 2015 23.827 2016 25.361 2017 25.198 2018 24.479 2019 24.415 2020 24.803 2021 24.015 2022 23.371 2023 23.267 2024 23.213 2025 22.567 2026 22.570 2027 22.686 2028 22.778 2029 23.003