Year Percent of GDP 1985 11.534 1986 12.608 1987 15.703 1988 13.368 1989 18.161 1990 12.244 1991 15.967 1992 16.016 1993 15.807 1994 17.931 1995 18.883 1996 20.341 1997 19.551 1998 19.281 1999 20.365 2000 18.891 2001 18.113 2002 16.903 2003 17.786 2004 18.072 2005 17.234 2006 40.854 2007 20.046 2008 16.829 2009 19.523 2010 19.791 2011 20.696 2012 22.393 2013 24.418 2014 21.588 2015 20.737 2016 21.847 2017 22.074 2018 22.8 2019 22.756 2020 23.002 2021 23.281 2022 23.648 2023 23.658 2024 23.694