Year Percent of GDP (Units) 1980 46.590 1981 35.688 1982 26.348 1983 25.999 1984 26.822 1985 18.764 1986 20.506 1987 25.001 1988 17.601 1989 40.749 1990 35.962 1991 30.675 1992 36.094 1993 37.875 1994 32.873 1995 8.871 1996 9.526 1997 10.152 1998 12.247 1999 12.293 2000 11.931 2001 14.509 2002 10.970 2003 13.725 2004 21.151 2005 19.327 2006 20.311 2007 26.518 2008 38.746 2009 37.222 2010 27.027 2011 23.351 2012 20.169 2013 16.513 2014 16.491 2015 15.992 2016 16.366 2017 15.806 2018 20.703 2019 22.684 2020 17.715 2021 15.098 2022 20.726 2023 24.018 2024 23.047 2025 23.594 2026 23.156 2027 23.315 2028 23.304 2029 23.523