Year Percent of GDP 1990 31.907 1991 35.302 1992 36.932 1993 29.422 1994 25.147 1995 23.715 1996 22.611 1997 20.112 1998 15.415 1999 13.842 2000 18.214 2001 20.41 2002 19.225 2003 18.828 2004 19.141 2005 18.379 2006 19.986 2007 23.948 2008 22.703 2009 15.419 2010 20.157 2011 24.307 2012 24.409 2013 22.995 2014 22.098 2015 21.73 2016 23.341 2017 23.861 2018 23.045 2019 24.313 2020 24.614 2021 24.699 2022 24.581 2023 24.747 2024 24.78