Year Percent of GDP (Units) 1980 0.046 1981 0.036 1982 10.747 1983 11.270 1984 11.442 1985 12.210 1986 12.230 1987 14.120 1988 13.653 1989 16.259 1990 17.042 1991 18.041 1992 18.341 1993 19.763 1994 20.434 1995 21.197 1996 22.574 1997 22.949 1998 22.477 1999 22.892 2000 23.642 2001 24.798 2002 24.622 2003 25.312 2004 25.320 2005 25.868 2006 27.449 2007 27.342 2008 28.471 2009 28.240 2010 27.048 2011 28.240 2012 29.247 2013 28.978 2014 29.517 2015 27.757 2016 27.720 2017 26.825 2018 29.990 2019 29.397 2020 26.588 2021 27.217 2022 27.764 2023 32.314 2024 30.605 2025 29.791 2026 29.446 2027 29.638 2028 29.624 2029 29.613