Year Percent of GDP 1980 25.919 1981 24.598 1982 23.647 1983 21.978 1984 23.015 1985 22.998 1986 23.096 1987 23.305 1988 23.834 1989 25.014 1990 25.732 1991 25.263 1992 24.227 1993 22.927 1994 22.855 1995 23.979 1996 23.499 1997 23.668 1998 24.253 1999 23.857 2000 25.221 2001 24.364 2002 25.745 2003 25.957 2004 26.137 2005 26.084 2006 26.905 2007 28.387 2008 28.957 2009 25.372 2010 25.463 2011 25.771 2012 25.46 2013 25.666 2014 26.006 2015 25.531 2016 26.803 2017 27.089 2018 27.884 2019 27.668 2020 27.654 2021 27.648 2022 28.196 2023 28.19 2024 28.301