Year Percent of GDP 1991 16.397 1992 14.677 1993 14.145 1994 17.35 1995 19.294 1996 22.131 1997 25.158 1998 25.107 1999 33.003 2000 26.953 2001 24.796 2002 22.029 2003 22.074 2004 24.057 2005 25.99 2006 28.253 2007 31.304 2008 33.602 2009 23.2 2010 24.84 2011 30.983 2012 31.012 2013 30.905 2014 28.879 2015 32.704 2016 30.711 2017 28.987 2018 25.792 2019 22.791 2020 24.811 2021 25.914 2022 26.189 2023 26.674 2024 26.59