Year Percent of GDP 1992 4.343 1993 2.049 1994 3.025 1995 14.494 1996 13.227 1997 12.935 1998 14.141 1999 16.201 2000 19.371 2001 10.991 2002 10.608 2003 14.058 2004 13.142 2005 17.412 2006 20.981 2007 16.802 2008 15.201 2009 18.988 2010 22.443 2011 24.405 2012 25.764 2013 27.162 2014 29.79 2015 28.451 2016 29.657 2017 31.952 2018 32.69 2019 31.981 2020 32.234 2021 32.46 2022 32.883 2023 33.279 2024 33.78