Year Percent of GDP 1985 22.774 1986 23.568 1987 22.242 1988 20.33 1989 21.256 1990 18.429 1991 20.067 1992 20.439 1993 24.073 1994 20.931 1995 21.246 1996 21.035 1997 21.27 1998 20.748 1999 23.328 2000 23.375 2001 24.616 2002 25.7 2003 25.119 2004 25.131 2005 28.246 2006 26.76 2007 23.453 2008 24.695 2009 26.248 2010 27.343 2011 29.338 2012 30.886 2013 28.203 2014 26.324 2015 25.924 2016 24.996 2017 24.684 2018 26.706 2019 28.207 2020 26.087 2021 26.257 2022 26.355 2023 26.434 2024 26.518