Year Percent of GDP 1990 22.47 1991 19.4 1992 17.953 1993 21.295 1994 19.44 1995 19.217 1996 24.104 1997 20.931 1998 18.292 1999 18.532 2000 20.643 2001 21.36 2002 30.167 2003 29.111 2004 26.842 2005 24.417 2006 27.128 2007 23.664 2008 21.303 2009 20.652 2010 21.893 2011 22.313 2012 30.007 2013 24.924 2014 24.959 2015 29.415 2016 28.004 2017 28.124 2018 28.976 2019 28.991 2020 29.009 2021 28.569 2022 27.908 2023 27.853 2024 27.57