Year Percent of GDP 1992 37.374 1993 29.403 1994 27.792 1995 25.789 1996 25.196 1997 20.093 1998 15.518 1999 26.463 2000 34.534 2001 30.174 2002 26.651 2003 26.018 2004 28.395 2005 28.699 2006 28.695 2007 29.136 2008 28.548 2009 19.268 2010 24.288 2011 29.064 2012 27.645 2013 24.455 2014 24.894 2015 26.7 2016 25.253 2017 25.969 2018 30.091 2019 30.032 2020 29.678 2021 29.15 2022 28.584 2023 28.142 2024 27.742