Year Percent of GDP 1990 19.016 1991 17.642 1992 18.801 1993 17.949 1994 17.838 1995 18.243 1996 19.246 1997 18.081 1998 20.66 1999 18.785 2000 18.005 2001 17.109 2002 19.294 2003 18.757 2004 20.122 2005 19.3 2006 21.863 2007 21.368 2008 21.05 2009 18.434 2010 22.214 2011 20.285 2012 19.779 2013 18.745 2014 19.732 2015 23.705 2016 24.043 2017 21.051 2018 19.93 2019 20.074 2020 18.885 2021 18.528 2022 18.245 2023 17.221 2024 17.153