Year Percent of GDP 1990 18.717 1991 16.292 1992 13.865 1993 13.296 1994 12.628 1995 12.697 1996 11.979 1997 12.724 1998 10.595 1999 11.622 2000 12.657 2001 15.003 2002 14.563 2003 14.771 2004 13.019 2005 11.009 2006 13.215 2007 8.674 2008 10.085 2009 16.25 2010 20.487 2011 16.041 2012 20.041 2013 18.639 2014 20.178 2015 21.702 2016 15.968 2017 17.219 2018 17.474 2019 17.876 2020 18.062 2021 17.816 2022 18.138 2023 18.184 2024 17.937