Year Percent of GDP 1991 28.98 1992 26.959 1993 27.973 1994 27.213 1995 27.878 1996 27.983 1997 25.731 1998 25.359 1999 25.184 2000 25.22 2001 25.162 2002 25.305 2003 24.622 2004 24.147 2005 24.166 2006 23.971 2007 24.463 2008 24.831 2009 25.843 2010 25.173 2011 29.295 2012 29.776 2013 32.426 2014 29.79 2015 29.168 2016 28.874 2017 30.315 2018 30.673 2019 31.715 2020 31.539 2021 30.648 2022 29.927 2023 28.811 2024 28.686