Year Percent of GDP 1980 22.094 1981 24.024 1982 25.708 1983 24.632 1984 27.627 1985 27.648 1986 26.535 1987 26.778 1988 27.468 1989 27.782 1990 27.416 1991 27.814 1992 24.429 1993 23.01 1994 24.925 1995 23.061 1996 24.577 1997 25.472 1998 25.464 1999 25.403 2000 24.804 2001 24.5 2002 25.041 2003 24.805 2004 23.329 2005 23.591 2006 24.174 2007 26.331 2008 28.473 2009 29.815 2010 28.933 2011 27.317 2012 25.854 2013 25.091 2014 29.248 2015 26.628 2016 29.71 2017 30.039 2018 27.727 2019 28.122 2020 28.322 2021 28.322 2022 28.322 2023 28.322 2024 28.322