Year Percent of GDP 1991 37.366 1992 30.707 1993 28.285 1994 22.77 1995 17.372 1996 14.688 1997 12.904 1998 12.18 1999 13.366 2000 13.219 2001 14.459 2002 15.168 2003 12.717 2004 10.299 2005 7.001 2006 4.989 2007 3.879 2008 4.921 2009 5.82 2010 8.56 2011 11.088 2012 11.946 2013 12.732 2014 14.957 2015 17.275 2016 21.02 2017 23.54 2018 25.561 2019 27.168 2020 28.131 2021 28.7 2022 28.784 2023 28.658 2024 28.275