Year Percent of GDP 1990 23.011 1991 21.538 1992 22.117 1993 22.844 1994 20.809 1995 20.272 1996 19.974 1997 21.749 1998 21.882 1999 23.417 2000 22.489 2001 21.549 2002 23.208 2003 22.028 2004 22.905 2005 25.087 2006 26.167 2007 28.477 2008 31.255 2009 28.653 2010 26.814 2011 27.223 2012 28.039 2013 27.845 2014 28.026 2015 26.532 2016 26.046 2017 26.557 2018 26.094 2019 26.035 2020 26.121 2021 26.294 2022 26.552 2023 26.695 2024 26.924