Year Percent of GDP (Units) 1980 7.564 1981 7.815 1982 10.803 1983 10.817 1984 11.816 1985 11.179 1986 10.684 1987 10.624 1988 9.770 1989 9.050 1990 8.522 1991 8.872 1992 10.612 1993 11.453 1994 6.420 1995 14.152 1996 13.619 1997 12.181 1998 11.473 1999 11.944 2000 12.283 2001 12.744 2002 12.620 2003 13.130 2004 14.359 2005 15.159 2006 15.019 2007 16.801 2008 21.355 2009 21.023 2010 20.554 2011 20.881 2012 23.288 2013 24.422 2014 23.226 2015 24.244 2016 26.150 2017 23.837 2018 21.367 2019 23.461 2020 25.115 2021 26.130 2022 24.497 2023 24.561 2024 28.967 2025 29.331 2026 28.894 2027 28.853 2028 28.326 2029 27.615