Year Percent of GDP 1988 21.433 1989 19.614 1990 22.008 1991 22.633 1992 23.092 1993 20.626 1994 22.352 1995 20.569 1996 11.712 1997 14.46 1998 18.05 1999 18.196 2000 16.83 2001 14.177 2002 16.975 2003 13.145 2004 13.607 2005 17.068 2006 14.074 2007 13.307 2008 16.412 2009 16.633 2010 18.602 2011 15.7 2012 16.366 2013 14.921 2014 20.02 2015 14.946 2016 12.572 2017 14.827 2018 16.849 2019 18.116 2020 18.38 2021 17.744 2022 17.713 2023 17.69 2024 17.371