Year Percent of GDP 1990 30.958 1991 27.782 1992 28.61 1993 24.963 1994 23.6 1995 22.919 1996 22.709 1997 21.456 1998 23.442 1999 24.993 2000 25.996 2001 28.624 2002 27.53 2003 28.468 2004 26.252 2005 24.886 2006 25.938 2007 26.256 2008 27.302 2009 31.328 2010 26.982 2011 27.473 2012 28.91 2013 28.175 2014 26.326 2015 25.101 2016 23.042 2017 21.869 2018 22.974 2019 22.953 2020 20.297 2021 20.193 2022 20.083 2023 19.986 2024 19.981